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What set off Adam Lanza's shooting spree?

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    Investigators search for motive in Connecticut school massacre

  • Duration 4:42
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There are new details coming in by the moments and we expect to learn a lot more in a matter of minutes here when the police have their first briefing of the day.

On what happened here in Connecticut the mother of Adam Lanza said to be.

Said to be nervous about her twenty year old son said to be warning a baby -- one point to never turn his back on her son not even.

To go to the bathroom.

Others saying it is no shock that he in the end was the killer in this town.

-- I had been.

Mostly upset saying no way this is not possible this is it could not have happen.

Upon the news.

And it was Adam.

Things started to click and ability to.

Involved himself about the students.

With us now to talk about this Saturday or -- -- is a former FBI investigator and a senior.

Vice president of control -- security consulting and doctor Michael Stone.

It's a professor of psychiatry at Columbia university in both you gentlemen thank you for your time here these are difficult questions doctor.

To try and figure out for what I can tell you.

After talking with people who live in this town.

Everyone in sandy creek knew who Adam -- it was.

He was the awkward one he was the standout who is socially.

Incapable of relating to other people.

When he would walk down the sidewalk he would stop and stared other people and stare and stare into those people pass -- left went away from them.

So his behavior was well known but why he acted that way it was not well known and I think the question doctor.

Is where's the trigger point.

To take an individual who is vulnerable.

And move him to the place where he went on Friday morning.

Well I -- I read something about.

The situation between him and his mother in this and just today's post every day children something little bit new.

He was about perhaps to go to a college.

And nevertheless she wanted to get a place near him because it was as though he could hardly exist without her but he also most of resented her deeply.

Realizing that he was this like a freak of nature a strange person.

-- needed mommy but at the same time he's twenty years old and probably wanted to feel that he could.

Do without her and not be assisting you -- or peculiar person that -- the mother.

But to be with him or nearby all the time so I think there's something in that chemistry.

That made him.

Really blow -- -- gets unhinged and move into a state of rage I mean the one thing that stands out about mass -- Is there are always fueled by a kind of avoid heart -- just different from serial killers that are cool.

-- this talking.

Driven by -- mass -- different.

So something.

Touched off that the race I think it had to do was something odd in the relationship between the -- -- him particularly as -- And as she's trying to find places around the country that he could go two.

A different colors.

Bill I -- should add to that but I want you to consider this as well.

The people who I talk to here in sandy -- say that this mother try to do everything humanly possible she could to help her own son.

And this was a lifelong struggle for her and I think they were good days and frankly there were bad days and Friday was an absolute.

Awful day.

How do you answer that question.

Well built that unity you know only -- to a small degree try to understand what may have been happening keynote in that home in and with.

He ended his condition and how -- mother was trying to.

Work with him I mean we're hearing now that -- -- -- for.

Out after the -- use use a weapon.

You know but what are the other thing she was doing to help them along it sounds like she was she was was dedicating his life.

To him.

However you know I think one of the important things is -- out of all of this bill is that.

This is really a discussion on never a number different levels it's a discussion about mental health.

It's a discussion about current issues in our society.

It's this discussion around schools' safety and security.

And none of them none of them by themselves -- stand alone at a does become a very intermingled -- kind of co joined.

Process -- to think that any one of them by themselves would have taken care of this I think would be naive.

Bill thank you a doctor thanks to you as well were waiting on this.