Original subtitles

Tonight, there are more questions than there are

answers surrounding the death of Melissa Millan.

Millan was a single mother of two and a senior vice president

at MassMutual Insurance.

At first, police thought she was the victim of

a hit and run.

But an autopsy revealed something much more.

Millan's death was a homicide.

The medical examiner says she was stabbed in the chest.

I would kill again.

They're dead, I'm alive.

I don't think it was wrong.

The thing inside of me is like...

the appetite, it's like a wolf that's...

feeling... the hunger.

Years later, a Simsbury murder is still unsolved.

And now the state's cold case unit is helping with

that investigation.

You know, he's making light of a murder, talking about

watching cartoons when he's in prison and was making a joke

about all the people.

He's someone who, he didn't end up confessing until years

after the crime.

So there's also a level of lack of remorse and callousness for

those years, at least where he didn't confess to it

that I think are striking.

He's talking about the devil and Jesus, and he's really,

in that moment, potentially playing

to his audience.

It's hard to know if this is Leverett distancing himself

from any real culpability.

It's easier to say, "Something inside of me,

"some monster inside of me,

some demon or devil inside of me did this,"

because then you don't have to actually take

responsibility for the fact that it was your own choices

and actions that did this.

Or, if it's more simplistic than that, that it's really just about

manipulating the people that are lending him support right

now, and showing him kindness.

What we have here is someone that's in anticipated

rejection, where at first they blame systems and other

people for all the problems that are going on

with the individual.

What we have, I think, in Leverett is a burgeoning,

maybe sexually sadistic psychopath.

I think we have someone who has already been willing to violate

the sexual boundaries of a child, who's now willing

to violate the physical boundaries of an adult,

who disconnects himself regularly, probably from

his group, probably from his treatment provider,

and whoever this new person is that's in his life.

The more you spiral through your cycle, the more you're

willing to engage in any misbehavior in order to feel

confident, in order to feel in control again.

He wants sex. For him,

everything about his self-esteem is related to

whether or not he can have sexual contact with someone.

In his anticipated rejection,

it's gotten to the point it can't be consensual anymore.

It has to be taken by force.

And I think that's why he has the knife.

This isn't a behavior he's done before, but it's a behavior

he's fantasized about a lot.

He didn't realize how delicate the human body is

and misinterpreted the timing with which he could use

the knife to subdue.

So it's almost like she's reading from a checklist of

signs of psychopathy.

And he starts to get worried about this rejection.

So he capitalizes on this opportunity, which makes

you wonder about his true intention of confessing in

the first place.

Was it because he felt guilty or he had some remorse

about the murder?

Or was it simply because he was trying to salvage

the relationship and he thought this was a way to do that?

He's now going back to the scene where Melissa Millan

was murdered, and he's reliving the incident,

he's reliving the thoughts and moments leading up to it.

There's a lot more discussion in this moment about

her sexual attractiveness.

And it's interesting that the first place his mind went

as he's watching this female jogger is not only a sexual

interest in her and that she's attractive, but a sexual

arousal pattern that sounds like it's activating within him.

There's clearly a sense of entitlement, as well as this

willingness to objectify or reduce people, in this case

women, down to objects, down to transactional needs.

He's not really interested in a deep connection.

And that's the fundamental difference between somebody

who's able to objectify others and somebody who actually wants

to relate to others.

Despite being in his 20s, he doesn't have a very good

understanding of his sexuality.

He compartmentalizes the opposite sex.

He doesn't talk about them as whole people, but he talks

about their body parts.

But he doesn't talk about them as a whole human being.

He doesn't know how to answer the question,

and despite saying he's not very good at getting aroused,

he then turns around and says he was aroused.

So what we see is somebody who has a very troubled

relationship with his own sexuality.

He has a troubled relationship with his own arousal patterns.

It's just not clear that he has any real or realistic

understanding of how to relate to women, certainly.

When he says a statement like, "The stabbing was very good,

the stabbing was very accurate," you get the sense

that in some ways he's maybe glorifying what he did,

that maybe in some ways he's still minimizing or denying

the idea that he was capable of really harming this woman.

It seems more confident than the Leverett we've seen over

the course of these interrogations.

So essentially he's saying, "I would have given up."

And what that starts to speak to is really this idea that

maybe it is a game for him, maybe it is a fantasy,

that this is all part of a hunt and prey.

And when he doesn't get his needs met quickly,

because again, we know this is someone that struggles with

impulsivity, so he's looking for instant gratification.

When he doesn't get it quickly, he doesn't have the stamina to continue.

What we can say is that William Leverett is far more

predatory than he comes across when you're looking at this

awkward, beat, young adult who really doesn't have any

social sophistication.

But what lies beneath all that awkwardness is a very predatory

individual who doesn't have a deep connection or value

or meaning for human life.

A Windsor Locks man accused of murdering a woman in Simsbury

is now pleading guilty.

Police say William Leverett stabbed and killed 54-year-old

Melissa Millan while she was running

on a trail in November of 2014.

My feeling that I remember that was most prominent

was severe mortal terror.

For some, manipulation is a tool

to gain power and control...

...for others it's actually about a game.