Shooter: Building 197

Aaron Alexis, 34, entered the Washington D.C. Navy yard to execute as many people as possible. Alexis had clearance to walk-in the building, according to F.B.I.

What made a nice guy, some said, massacre people innocently going to work?

Let's look closer.

Alexis was hearing voices, had a bad relationship break-up.

Friends brought Alexis food while he played violent video games up to 16 hours a day. A sign of problems, or what will come?

Friends were aware of the voices Alexis heard, but not one person pushed him to seek help.

Now, it's reported that Alexis tried to reach-out to the Veterans Administration. For reasons that are unclear, he didn't get the necessary help.

How about free clinics, ER? His friends could've staged a kind of intervention.

Alexis was diagnosed with mental problems, include PTSD, before the break-up.

It's reported Alexis visited Thailand, became serious about a woman. He wanted her to move back to the United States with him. She didn't, and he was hurt.

Alexis returned from Thailand alone, moved around the country.

He was liked. A few thought he was nice.

Alexis' behavior started to get aggressive, and the unthinkable happened.

Someone along the chain of friends, associates, should've recognized that Alexis needed help. Friends, associates, should of made sure Alexis received help.

The F.B.I. Is looking for tips or any information about Aaron Alexis. The telephone number is: 1-800-call-FBI.