Sep 25, 2013 2:52 PM by Brian White
The FBI says Aaron Alexis, the man who went on the deadly shooting rampage at the Washington Navy Yard, was under the "delusional belief that he was being controlled or influenced by electro-magnetic waves."
This alarming video of alexis was released Wednesday.
You can see Alexis running through hallways with a sawed-off shotgun. Alexis killed 12 people and wounded several others.
The FBI says Alexis acted alone and there was no evidence he was targeting particular people.
The investigation indicates that Alexis "was prepared to die during the attack."
The FBI also says phrases were scrawled onto aAexis' shotgun. Reading "end to the torment," "not what y'all say," and "better off this way."
He also wrote "my ELF weapon," which is believed to be a reference to electro-magnetic waves.