Sep 25, 2013 2:18 PM by Associated Press
WASHINGTON (AP) - The FBI says the Navy Yard shooter believed he was being controlled by electromagnetic waves (ELF) and had written "my ELF weapon" on a shotgun he used in the rampage.
Here's surveillance video of the shooter from that day at the Navy Yard:
The FBI also says there is no indication that Aaron Alexis targeted any specific individuals when he opened fire inside a building, killing 12 people.
Valerie Parlave, head of the FBI's field office in Washington, said Wednesday during a news conference that investigators are continuing to explore the background and motivations of Alexis. However, she says Alexis had a well-documented history of mental health issues.
Alexis, a former Navy reservist and IT contractor, was killed in a shootout with police.