Original subtitles

[suspenseful music]

- The first thing that I started noticing was the smell.

It smelled like meat that was sitting in a warm pot

or in a warm room for months.

I went up and down the hallway, sniffing at people's doors,

because it was getting unbearable.

When I got to his door, I could really smell it.

[suspenseful music]

[suspenseful music]

- [Detective] Five of the most prolific serial killers

in American history were all operating at the same time.

- [Reporter 1] John Wayne Gacy...

- [Reporter 2] Ted Bundy is still alive...

- [Reporter 3] BTK.

- [Reporter 4] Jeffrey Dahmer.

- [Reporter 5] The so-called Green River Killer.

- [Reporter] This was the golden age of serial killing.

[suspenseful music]

- [Female Detective] Ridgway was killing them within days,

weeks of each other.

There were just so many victims during that time.

- [Male Reporter] Four more victims were discovered,

three in the river, and one on the river bank.

All of them had been strangled.

- When I enlisted, my roommate was Jeffrey Dahmer,

and then it just started, night after night, the attacks.

He was raping me every single day.

- [Male Reporter] Dennis Rader has not killed for years.

And law enforcement is at a dead end

with regard to the identity of BTK.

- You see Bundy's narcissism

on full display in the courtroom.

Bundy actually thought that his abilities as an attorney

were going to be so good

that he wasn't even gonna be convicted.

- And this court here by impose the death penalty

upon the defendant, Theodore Robert Bundy.

[suspenseful music]

- [Female Reporter] It took the jury less than two hours

to find John Wayne Gacy guilty of murdering 33 young men.

- When he was sentenced to death,

he didn't even blink.

He didn't bat an eye.

Nothing.

Now, that's a true sociopath.

I mean, the guy was scary.

[suspenseful music]

- Power and control definitely plays

into the motivation of a serial sexual killer.

And certainly in the five cases that we're discussing,

Ridgway, BTK, John Wayne Gacy, Dahmer, Ted Bundy

all very relevant to them.

That was all part of what turned them on.

And caused them to wanna do it over and over again.

[suspenseful music]

- [Male Reporter] The Green River task force still

is looking for the lead that will break the case.

- In January of 1984,

Gary Ridgway is divorced from his second marriage.

He has one child,

but is still working at the Kenworth Trucking Company.

But in the past two years, he has killed 41 women.

- He spent so much time trolling the highway,

picking women up, killing them, dumping their bodies.

His true avocation and what he enjoyed doing

was hunting and killing women.

And he was proud of the fact that he was good at it.

[suspenseful music]

- [Male Reporter] Angry residents are demanding police

do more to stop the killings.

- When the news started reporting

about the bodies being found along the Green River,

there was an outrage in the public.

There was an anger and a frustration.

It was like because all of the victims are prostitutes

and runaways, are they less important?

- We are very disappointed

in the focus of the media attention.

The focus has constantly been on the fact

that these women are prostitutes.

That's not something we can stand for.

These women are women first

and they're being killed.

[suspenseful music]

- [Pennie] Special funds from the county were allocated

to the Green River Killer task force.

- [Reporter] The Green River task force was doubled in size,

making it the largest police investigation

in Northwest history.

- And I believe they were trying to show the public,

hey, we're really taking this seriously.

And we're gonna catch the guy.

- [Reporter] The $200,000 Green River task force computer

will make connections and comparisons about the case.

It's a high-tech way to try and warm

what is a very cold trail.

- During that time, Ted Bundy was in prison in Florida.

He was on death row.

And he contacted Washington law enforcement

and offered to share his thoughts about

who this killer was.

- He hadn't confessed to his own crimes,

but Ted Bundy had offered

to give law enforcement hypotheticals.

Here is how the killer might have done this

or how the killer might have evaded law enforcement.

- Ted Bundy was from the same area in Seattle.

Although the victims he was selecting were different.

Nonetheless, it was still a predator

in that same part of the Northwest.

They understood that he was trying to extend his life.

He did not want to be put to death,

but they also really wanted to have help.

- So some detectives flew down to Florida to interview him.

[suspenseful music]

- The portrait that he painted

of who the serial killer known

as the Green River Killer was,

was probably more of a self portrait of Ted Bundy.

[suspenseful music]

- One of the worst things that can happen to someone

that's psychopathic in nature is put them in prison

and now they have to live a routine every day.

And so if he's able to spend hours and days talking

to homicide investigators coming from all over the country,

it really does take him away from the boredom

that I'm sure he was experiencing

down there on death row.

- I don't think he had anything to say that was relevant.

I think it was just, he wanted to be in the limelight again.

Be important.

- Ultimately, he had no information

at all that was helpful to the investigation.

Everybody thought the Green River case

was never gonna get solved,

but then Rebecca Garde had the courage to come forward

and report what happened to her.

[suspenseful music]

- I was strangled by Gary Ridgway.

I'm the only survivor. [melancholy music]

At the time, the area

had been getting more and more killings

and the numbers would flash up on the TV screen quite a bit.

They were asking for the public's help.

- And hopefully with the community's support,

we'll solve this case.

[melancholy music]

- I had to make sure that I was going to be ready

to say everything that happened to me.

- It was understandable

that she didn't come forward initially.

And frankly, at that time,

there wasn't a lot of effort

to prosecute people who victimized women

who were engaged in prostitution or sex trade workers.

There just wasn't.

Law enforcement was not interested in it.

Prosecutors weren't prosecuting those cases.

[suspenseful music]

- I finally got the courage to talk to the police.

So one day, out of the blue, I gave them a call.

- She had a critical piece of information

that they hadn't had before.

- A lot of times what he would do

to put our victim's mind at ease is he would say,

I have a good job.

And maybe he would show them his Kenworth ID.

And he would show a picture of his young son and say,

I'm not a killer.

I'm a father.

He could show them anything

because he knew he was gonna kill them.

- [Rebecca] They actually showed me a bunch of photos

that were in a photo album.

- She was able to give us the name.

- I had picked out his photo.

Of course, he was right in my face

when he was attacking me.

- He always had weird evil eyes.

Every photo and every picture that I see of him,

I see those eyes. [dramatic music]

I remember them.

[suspenseful music]

- Rebecca Garde Guay was so important

because she was the one who established for us

what Ridgway was really capable of

and what his MO was. [suspenseful music]

- I felt a little bit of relief

and I also felt it would be the worst thing that I've done

in my life because I had now reopened

what exactly had happened in the past.

[suspenseful music]

- They were able to identify Gary Ridgway,

who she picked from a photo montage,

as the man who had attacked her.

- We took a statement from Rebecca

and then interviewed Ridgway and he admitted to it.

He said, oh yes, you know, that was me.

I did that.

But I strangled her because she bit me and assaulted me.

It was self-defense.

- It sounds like a legitimate excuse to law enforcement

and they leave it.

- And so the case never resulted

in any sort of criminal charges.

- I felt like nobody was trying to help me

with what happened to me.

And he had already admitted that he had strangled me.

This was a tip that coulda helped stop

so many women from dying.

That blows me away to this day.

[suspenseful music]

- There were a number of detectives

who truly believed he was the Green River Killer,

even back then,

but certainly we did not have the evidence

to move forward with prosecution.

[suspenseful music]

- He seems like he could be the guy next door.

That one person that's always willing to give you a hand

or help you out with something.

My name is Martha Sidock

and I used to work with Gary Ridgway

at the Kenworth plant in Renton and Seattle.

He took his job very seriously.

He was a good employee.

I worked in the paint department along with him.

He worked in where they put the paint colors together.

And then also in the fine line design.

Always happy go lucky kind of attitude.

He always said hi.

Every now and then,

he would bring me like a grocery bag of books.

And he knew the authors that I liked

and would have those books.

So if he went and bought them or something,

or just happened to have them, I don't know.

You woulda never guessed in a million years that,

you know, he was doing what he was doing.

[suspenseful music]

- In 1985, Gary Ridgway meets his third wife

and apparently falls madly in love.

- [Katie] Gary Ridgway and Judith met

at the peak of his killings.

Judith was out listening to country music.

Judith was immediately struck by Gary.

They danced for that entire evening until the place closed.

- By her description,

they had a very happy fulfilling marriage.

They were always together.

And the killings slowed down.

They didn't stop,

but they were not as prolific

as they were in the '82 to '84 range.

- Murder rates can go up and down.

And sometimes this depends on what's going on

in the environment of the killer.

Psychologists often talk about positive protective factors,

like marriages and raising children as experiences

that might lower murder rates in these individuals.

And we actually see that with Ridgway,

when he marries his third wife, Judith.

[suspenseful music]

And also with Rader,

when he begins to become engaged

in raising his own children.

[suspenseful music]

- By 1985, BTK had disappeared.

Everyone thought he's either dead or he's in prison

because no one's heard from him since 1979.

- So the question is, what happened to him?

- At that time, they thought there's no way

someone with this compulsion to kill could stop.

[suspenseful music]

[keys tapping]

- There are practical reasons

that serial killers stop for a period of time.

In the case of Dennis Rader, he had a busy life.

He was working, he was working in his church.

He had a family, he had children.

Even though those urges

and those compulsions are still very powerful,

he had other things going on in his life,

occupying his time.

- And then in 1985, he kills his neighbor, Marine Hedge.

[suspenseful music]

- Marine Hedge lived up the street from Dennis Rader.

And years later,

he will talk about how proud he is of this homicide

because of the risk he took in killing somebody

in his own habitat.

[suspenseful music]

- He would walk down the street with his daughter

and say, hi, Marine, how are you?

[suspenseful music]

- [Reporter] 53-year-old Marine Hedge

was last seen a week ago by a friend

who'd taken her to dinner.

She was home by 1:00 AM Saturday.

Later that day, her door was found ajar,

her phone lines cut, and Marine Hedge was missing.

[suspenseful music]

- [Reporter] 53-year-old Marine Hedge was last seen a week ago.

There are very few clues to work with on this case.

[suspenseful music]

- He's blacked out windows.

And he did this so he would have time to spend with her

and he will take hundreds of Polaroid photographs of her,

posing her in various positions.

- Dennis Rader is a treasure trove of paraphilias.

He was sexually aroused by binding and torturing others.

He's sexually aroused by binding

and basically torturing himself.

He's sexually aroused by dressing

in the undergarments of women.

And so all three of these,

sexual sadism, masochism, and

what we will call transvestic fetishism represent

his sexual inclinations,

manifesting in these,

what we would consider unusual behaviors.

[dramatic music]

- [Female Reporter] The body was nude

and police say badly decomposed.

A pair of knotted pantyhose

were found lying in the ditch beside it.

But police say that's about all the evidence

they have to go on.

- Well, they never dreamed this was BTK

because BTK had disappeared.

This was seven years later and this wasn't his MO.

He would keep the bodies strangled inside the house.

- Her case was thought of, at that time,

as kind of a one off.

It just didn't make sense that he wouldn't

at least seek some acknowledgement.

- Unlike lots of serial killers,

he worked to get the media to acknowledge him.

So, in this case,

it's really kind of unusual

in that he doesn't reach out to the media.

- It may reflect that his needs for attention

are being met elsewhere,

or that he is very aware

that law enforcement may likely catch him

if he does reach out.

[suspenseful music]

Like Dennis Rader,

there was a long period of time

where Jeffrey Dahmer did not kill.

In 1978, he committed his first murder at age 18.

And that he desperately does everything he can

to not repeat that same act.

He uses alcohol.

He goes and steals a mannequin.

His grandmother makes him give the mannequin away,

but eventually he starts on a downward spiral

of escalating behaviors that seem

to bring him closer and closer and closer,

back to the act of serial homicide.

[suspenseful music]

- During the time that Dahmer was

between his first and second victim,

he would go to the bath houses

and that he would have anonymous sex with a number of men.

- Dahmer began drugging some of these men.

[suspenseful music]

- The way that Jeffrey Dahmer would operate

would be to, you know,

give his victims a drink and crush sleeping pills in it.

- And then when the men would wake up

or start walking around Dahmer, didn't like that.

He wanted them to be still,

basically pretend they were dead.

- Jeffrey Dahmer, in an interview, even admitted

this intense need to control his victims.

- In one case, the guy didn't recover.

He wasn't killed, but he was heavily asleep.

The bathhouse operator was alarmed.

Summoned an ambulance. [siren wails]

But it did not come to the attention of the police,

whether the complainant didn't wanna do it,

didn't wanna be connected with a bath house.

Can't tell you that,

but it did not come to the attention of the police.

- The gay community

has always had a contentious relationship

with the police force.

You know, they remember how gays were treated by police

because it was illegal to even be gay.

So gays were very apprehensive to have anything

to do with the police at all.

- Knowing that he was involved in this drugging situation,

the word got out, don't let Dahmer in the bath house

'cause he's doing something to the other customers.

So they banned him from the bath houses.

[suspenseful music]

- [Robert] Almost exactly one year later,

Dahmer kills a second victim.

[suspenseful music]

[upbeat music]

♪ You

♪ You build a fortress

♪ For yourself

- In 1987, Jeffrey Dahmer started going

to gay bars in downtown Milwaukee

and he met a young man, Steven Tuomi.

[suspenseful music]

- Dahmer picks up Steven Tuomi

and takes him to the Ambassador Hotel where they have sex.

- [Patricia] They had drinks and Dahmer drugged the drinks

with the Halcion.

- The next morning,

Dahmer wakes up and Steven Tuomi is lying dead beside him.

Now, at first Dahmer said he had no recollection

of the events.

but later Dahmer did say

he does remember punching Stephen Tuomi in the chest,

but that was about it.

[suspenseful music]

Once Steven Tuomi is dead, he has to dispose of the body.

So Dahmer goes to a store, buys a huge suitcase,

comes back, dismembers Steven Tuomi,

and puts him in the suitcase and then gets into a cab.

And the cab driver remembers smelling an awful funky smell

coming from that suitcase.

[suspenseful music]

- The cab driver picked up the suitcase

and made a comment about it being heavy

and even quipped,

"What do you have in here?

"A dead body?"

[suspenseful music]

- [Patricia] Jeffrey Dahmer called a cab to take him home.

And when he took the body out of the hotel

in this huge suitcase,

the cab driver questioned Dahmer

about why the suitcase was so heavy.

I don't know what he told him was in there,

but he got away with it.

The cab driver didn't go to the police

and they never found Steven Tuomi's body.

[suspenseful music]

- [Narrator] For years, the Green River task force

has chased the ghost of a killer

who remains too diabolically clever to catch.

- By 1987, Gary Ridgway was still a person of interest.

And we had had a number of conversations with him.

- Gary was questioned by police a number of times

because of the fact that he traveled up and down Highway 99

so many times.

He was known by the prostitutes.

- Two of the detectives put together a search warrant

for Ridgway's residence

based on all of the information that they'd had,

the fact that he admitted frequenting prostitutes,

the Rebecca Garde Guay information,

and so on and so forth.

- [Patty] They were able to search his house

and his car and his work locker at the Kenworth facility.

[suspenseful music]

- The police had actually come to the plant.

It was a little unnerving to think

that he was a potential suspect.

People started calling him Green River Gary.

[suspenseful music]

I like to try to give everybody the benefit of the doubt,

but there was a few times he would come up behind me

and like put a hand on each shoulder.

And one time, he said that, you know,

you don't even have to use your hands to kill somebody.

It almost was like he was waiting to see

what I would do or say by saying something like that to me.

That really unnerved me.

- During that search warrant,

they didn't find any smoking gun evidence

that in any way tied him to the Green River murders.

But they collected a DNA cheek swab from him.

[suspenseful music]

- We asked him, did you want a piece of gauze?

That was for blood typing.

- It was pretty standard at that time

when you executed a search warrant

to take biological samples from people

to identify what blood type they were,

which is, you know, all that was possible at that time.

And then, of course, you know, the science developed.

- Little did we know that that specific piece of gauze

would be the key to this case 20 years later.

[suspenseful music]

- A year after he kills Steven Tuomi

Dahmer starts to adapt his methods

and he begins luring men home with him.

And eventually evolves into going out

to victimize younger men, even young teenage boys.

- Keison Sinthasomphone was 13

when Dahmer observed him walking home from school

and offered to pay him money

if he could take some photos of him posing.

[suspenseful music]

- Keison was a child

and Dahmer specifically targeted victims

who were very small.

And that was so he knew he could overpower them,

you know, drugged them first

and then was able to handle them physically.

- Dahmer had him come into the apartment,

asked him to pose nude.

[camera clicks]

Back then, no cell phones,

but he had a Polaroid and he took Polaroid pictures of him,

gave him a drink that was laced

with a very powerful sleeping pill.

- He sexually assaulted him,

but Keison was able to escape.

[suspenseful music]

- At some point,

the young man decided to leave

and Dahmer didn't use force to restrain him.

He let him leave.

- He was staggering.

He was pretty much out of it.

His parents called police.

They were able to identify Dahmer's apartment.

- Dahmer confessed to it

and the prosecution went forward.

He was convicted of sexual involvement with a child.

Even after that, he couldn't stop himself.

He was a very calculated, clever, capable killer.

- While Jeffrey was waiting sentencing,

his urges became uncontrollable.

[dramatic music]

[suspenseful music]

- Good morning.

For 10 years,

Ted Bundy has been fighting execution

in Florida's electric chair.

30 minutes from now,

Bundy is scheduled to die here at the Florida State Prison

on death row.

- I think it's finally going to be over.

It's been 15 years of ups and downs.

And then we can just sit back

and concentrate on the good memories.

The night of his execution,

it wasn't a happy occasion for us.

It was necessary.

But the carnival atmosphere that played out

on the lawn in Starke, Florida was sickening to us.

[people cheering] [suspenseful music]

- [Female Reporter] Several hundred spectators turned out

for Bundy's death.

In just about 10 minutes,

the serial killer is scheduled to be executed here

at Florida State Prison.

[people cheering]

- His head was shaved and he was as white as a sheet.

He was just as scared as he could possibly be.

And when the switch is thrown,

Bundy's fists tensed.

As I watched his hands,

I wondered how many throats

had those hands tightened around.

- Serial killer Theodore Bundy is executed.

This morning, he died in Florida's electric chair.

- After three trials, three death sentences,

and several rejected appeals.

And 10 years on death row.

Bundy is finally executed.

[people cheering] [melancholy music]

- I was glad when he was gone

that nobody else would be hurt.

But, unfortunately, killing a serial killer

[melancholy music]

doesn't stop them from being a serial killer.

They did their damage.

- The FBI's development of research

and focusing on these types of cases really was solidified

with the Bundy case.

Every serial killer is different.

They're motivated different ways.

They engage in different behaviors.

But if we can develop a construct,

patterns start to emerge.

They're very egocentric, narcissistic,

thinking only of themselves.

It's about power, control, dominance.

Everything is about them.

[suspenseful music]

- [Robert] While Jeffrey Dahmer is awaiting sentencing

for his sexual assault on Keison Sinthasomphone.

He's free to walk the streets

and then he meets his next victim, Anthony Sears.

- Tony was always the life of the party.

[upbeat music]

You know, you could take him anywhere

and you do you were gonna have a good time.

[upbeat music]

If we were at a certain club or something

and some song would come on,

it would be off to the dance floor.

Let's go talk to this person.

♪ I'm only alive

One night, we ended up going to one

of the bigger night clubs at the time.

So I went off and did my own thing

and later that evening,

I met him at the same corner, like we always did.

And that is when he introduced me to this person, Jeff,

that he had met.

He seemed just as normal and average

as anybody else you would meet.

[suspenseful music]

[engine rumbling] [suspenseful music]

The three of us ended up getting into my car.

Tony and him sat in the back seat.

When I dropped them off,

they hopped out of the car and ran across the street.

I never really saw where they went.

[suspenseful music]

- Jeffrey Dahmer's MO was to drug the victims

when they came in and then he would go after them sexually.

And about the time the person would be recovering,

he would strangle the individual to death

and then continue his sexual activities

with a deceased body.

What we call necrophilia, sex with a dead body.

[suspenseful music]

- For some killers,

the kill is the exciting piece of this.

The control that they have as somebody's life drains away.

But for Dahmer, the kill was not what he liked.

The kill was just something he had to get through

to essentially get to the good things,

which was control and possession of the victim.

[suspenseful music]

- With Anthony Sears,

Jeffrey Dahmer did something a little bit different.

He takes the severed head and genitalia

and places them in a refrigerator

to re-enact or relive the event at a later date,

as well as to use these body parts for sexual gratification.

He is having his victim with him forever.

[suspenseful music]

- Nobody knew what had happened to Tony.

I thought personally that he was just spending more time

with this person.

Because I was the last person to see Tony,

the police would come over to my house and talk to me.

[suspenseful music]

I paged through hundreds and hundreds of pictures

to see if I could recognize Jeffrey Dahmer.

I didn't really recognize anybody in the pictures.

I don't think I could've given a good enough description

of what Jeff looked like at the time.

I didn't really pay that much attention, I suppose.

[melancholy music]

I still feel guilty.

I blame myself.

I just felt that I should've take care of my friend more.

[melancholy music]

[suspenseful music]

- When Jeffrey Dahmer killed Anthony Sears,

he was awaiting his sentencing for a sexual assault.

Dahmer is sentenced to a year in prison

for the sexual assault,

but somehow convinces the judge to let him out

after 10 months.

Afterwards, he moves into an apartment

on the west side of Milwaukee.

[melancholy music]

- The neighborhood was seedy.

I always call it seedy.

[car whooshing]

There were a lotta working girls,

pimps, drug dealers.

I lived right across the hall from Jeff,

right across the hall from him.

Three feet.

He was outta place to be the white guy down here.

Nice looking.

Wasn't anything wrong with him.

And I would keep asking him, why are you staying down here?

I would see him occasionally bringing a guy into his house,

but then, as it kept going on, I said,

I always see you bringing men home with you,

but I don't ever see them leave.

I said, they must spend the night

and then get up early in the morning and leave

like before we give up or something.

And he'd say, yeah.

Yep, that's it.

[phone rings]

- And very unfortunate and just a unbelievable twist,

Keison Sinthasomphone's brother, Konerak,

also was befriended by Dahmer.

- Konerak was only 14 years old when Dahmer met him

at the Grand Avenue Mall in downtown Milwaukee.

And he talked him into coming to his apartment

under the pretense of taking photos,

just like Konerak's older brother.

[suspenseful music]

- He got the young man into his apartment, drugged him,

and then started drilling into his head to see

if he could make him into a zombie.

Dahmer had this fantasy of getting a zombie,

a sex zombie, to be completely submissive to him

and do what Dahmer wanted.

[suspenseful music]

- Jeffrey Dahmer's mother suffered

from some sort of mood disorder

where she was consistently doped up on drugs

and passed out on the couch.

So this feeling of interacting with someone

who was basically a zombie gets recreated

in his murderous crimes.

He literally tried to create zombies

by injecting acid into their brains.

[suspenseful music]

- Dahmer frequently drank when he was doing these things.

So he decided to go out and get some alcohol.

Well, the young man got out of the apartment,

got down onto the street.

And he was found by some young children

who called their mother.

[suspenseful music]

- Me and my friends were outside.

[suspenseful music]

This boy came down the hill

with the sheet wrapped around him.

There was blood on the sheet

and he was just standing like shaking like that.

And we were like,

where did you come from?

And he had said something about, I came from that apartment.

[dramatic music] [siren wails]

- Finally, the police got there

and they deduced that Konerak couldn't speak English

because he couldn't articulate what was wrong.

- You know, this kid had had a small hole drilled

in his head and acid poured in

and he had been given Halcion.

So he was really incoherent.

So he couldn't communicate with law enforcement.

[suspenseful music]

- At this point,

Jeffrey Dahmer himself comes down the steps

and he told the police that Konerak was his lover

and that they were living together

and that they'd had a lover's spat

and that he'd had too much to drink.

And so they believed him.

[suspenseful music]

- The cops were so like,

would y'all stop calling us down here

because if he's having sex with him and it's consensual,

there's nothing we can do.

We kept trying to tell him, but he's a kid.

He's a kid.

He said, well, he's telling us he's not a kid.

So who should we believe?

Believe the white guy.

[suspenseful music]

[suspenseful music]

- And they let Konerak go back into Jeffrey's apartment.

And within an hour, he killed him.

[suspenseful music]

It's heartbreaking.

- You know now, I had said to Jeff that night,

I said, this is a kid.

Honey, this is a young boy.

He said, well, we're not doing anything.

You know, he said it doesn't matter.

And then he just went in his house

and just closed the door on me.

[suspenseful music]

But then I started noticing the smell.

And then one time my daughter had came over

and she said, Ma, that is a dead body.

[suspenseful music]

- Dennis Rader, Jeffrey Dahmer,

and Gary Ridgway are still out there killing,

but their number is coming up.

[suspenseful music]

- It was a nightmare.

1991 put Milwaukee on the map unfortunately.

- [Michael] They had no idea what they would find there.

Didn't know there was a skull in the refrigerator.

It was a death nest.

- [Katie] The DNA came back positive,

matching to Gary Ridgway.

- [Mark] And we had 40,000 suspects.

Now we got the guy.

- Just tells you what science can do.

- The BTK murder mystery may be nearing an end.

- We knew far more about him in just a couple of months

than we knew in the first 28 years of this investigation.

- I still, to this day, when I talk about it

or think about it, I get goosebumps because that's him.

That's BTK.

[suspenseful music]