Well, he might have had a little problem with impulse control. And NBC is reporting he attacked the FBI agent with a knife . and he reportedly confessed to the agent that he had "played a role" in that triple murder in Waltham in 2011. He apparently attacked the agent as he was about to sign a written statement based on his confession about the triple homicide.

NBC is also reporting he had U.S. citizenship, not a green card. Needless to say, all of this information is subject to change.

Onward and upward,
airforce