WASHINGTON (WJLA) - The man who carried out the Sept. 16 mass shooting at the Washington Navy Yard believed he was being controlled by low-frequency electronic waves and expected to die after the shooting, the FBI said Wednesday.
While the FBI is continuing to investigate shooter Aaron Alexis and his motives, the FBI's Valerie Parlave said he acted alone during a 70-minute rampage during which he killed 12 people.
"There are indicators that Alexis was prepared to die and accepted death as the inevitable consequence of his actions," she said.
On Wednesday, the FBI also released surveillance video of Alexis taken on the day he committed the mass shooting. The video shows Alexis driving his vehicle into the Navy Yard as well as walking through Navy Yard Building 197 armed with a sawed-off shotgun.
Etched into the shotgun were several phrases, including "not what ya'll say," "end to the torment" and "better off this way," Parlave said.
Also etched into the weapon was the phrase "my ELF weapon," a reference to the electronic waves he delusionally believed were controlling his thoughts, Parlave said.
A document retrieved from the electronic media stated quote, 'ultra low frequency attack is what I've been subject to for the last three months and to be perfectly honest that is what has driven me to this,'" Parlave said, quoting the document.
According to a timeline released by the FBI, Alexis drove into the Navy Yard just before 8 a.m. on Sept. 16 and entered Building 197 minutes later. He fired his first shots at 8:16 a.m., touching off a rampage that lasted an hour and 10 minutes.Time Incident 7:53 a.m. Alexis pulls into Parking Garage 28 at the Washington Navy Yard, just across from Building 197 8:08 a.m. Alexis enters Building 197 carrying a backpack 8:09 a.m. Alexis exits elevator on 4th floor, enters men's bathroom carrying backpack and clipboard 8:15 a.m. Alexis crosses hallway into 4 West area of Building 197 with a shotgun 8:16 a.m. Alexis shoots his first victim in the 4 West area 8:17 a.m. First 911 call received from 4th floor of Building 197 8:20 a.m. Alexis leaves 4th floor, taking stairs down to 3rd floor 8:28 a.m. Alexis appears on 1st floor 8:57 a.m. Alexis returns to 3rd floor 9:25 a.m. Alexis shot and killed by law enforcement officers on 3rd floor
By the time Alexis was killed, a total of 12 were killed and four were wounded in what became deadliest shooting at a military installation since 2009.
The FBI has also requested search warrants for several items belonging to Alexis that were found at the scene, including a Google and Yahoo! account belonging to him, a laptop, a cell phone and other items found inside his backpack.
"He was a mentally unstable individual and he was able to obtain a firearm two days before he carried out an attack designed to kills as many innocent civilians as possible," says U.S. Attorney Ron Machen.
On Wednesday night at Mt. Carmel Baptist Church, hours after the surveillance video was released, different faiths gathered to pray for those affected by the mass shooting at Navy Yard.
"It's important as a community to come together to let the families know we're thinking about them and standing with them," said Derek Hariston of Waldorf.
D.C. Mayor Vincent Gray, also in attendance, grew fiery as he questioned why post-Newtown, gun laws still are not able to stop a mentally ill man from purchasing a gun in Virginia and killing 12 people in a shooting rampage:
"What do we have to show for it? Absolutely nothing! If that change doesn't come, the only question is what day do we assemble again to mourn the loss of more people who have been gunned down?"
According to Valerie Parlave with the FBI Washington Field Office, "There is no evidence or information at this point that indicates he targeted anyone he worked for or worked with."
Authorities say they have found evidence that Alexis was prepared to die, believing death was the inevitable consequence of his actions.