Profile of the Alleged LAX Shooter

Police identify airport suspect as Paul Anthony Ciancia, 23, of Los Angeles.
1:41 | 11/01/13

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Transcript for Profile of the Alleged LAX Shooter
Tonight the fbi confirming the name of the gunman, working to put together a profile now, who he is, what made him snap. And this evening our team learning his family might have reached out to authorities before all of this. Abc senior justice correspondent pierre thomas working his sources from washington. Pierre, good evening. Reporter: David law enforcement tells us police found a note at the scene suggesting the suspect was anti-government, he expected to die in today's confrontation, tonight as you said, we know who he is. Police say the suspect apprehended in the shooting is a WHITE MAIL IN HIS 20s, SOURCES Say the man had been living in los angeles. But also resided in pensville, new jersey. Paul ciancia, age 23. You can see in this video police converging on his former new jersey home. Abc news spoke with the police. Bhiel police there cannot confirm that ciancia is the shooter, they opened details on the young man's state of mind. A call came in today to police from a concerned family member. Their younger child got a text message from paul stating that there was comments in there about his well being, and he wanted to possibly take his own life. And at that point, paul, his father, called me. And I went over there, and i made phone calls to lapd to get a well being check on him. Reporter: Sources say the note recovered at the scene ended with the letters nwo. Which law enforcement believes refers to new world order. At this point the fbi believes he acted alone. They will investigate whether he has any ties to domestic terrorists. David. Attention turning to those red flags. Pierre thomas, thank you.

This transcript has been automatically generated and may not be 100% accurate.

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