There is nothing graphic about this footage and he is never seen discharging his weapon nor is around anyone but it is definitely chilling knowing that the man depicted here was at the time preparing for and embarking on a self-imposed mass killing. Beforehand Aaron Alexis believed he was being mind-controlled and influenced by others using some kind of electromagnetic waves. Unbelievable.

 

 

Along with that chilling footage, the FBI also released this timeline of Alexis' activitity before being taken down by police.

7:53 a.m. - Alexis’ rental car, a blue Toyota Prius with New York plates, entered Parking Garage #28 at the Washington Navy Yard, located directly across from Building #197.
8:08 a.m. - Alexis exited Parking Garage #28 on foot carrying a backpack. Alexis entered Building #197 and proceeded to the elevator.
8:09 a.m. - Alexis exited the elevator on the fourth floor and entered the men’s bathroom carrying a backpack and a clipboard.
8:15 a.m. - Alexis crossed the hallway into the 4 West area of Building #197 with shotgun, but without the backpack or a clipboard.
8:16 a.m. - Alexis shot the first victim in the 4 West area of Building #197.
8:17 a.m. - First 911 call is received from the fourth floor of Building #197.
8:20 a.m. - Alexis left the fourth floor using the stairs and entered the third floor.
8:28 a.m. - Alexis appeared on the first floor.
8:57 a.m. - Alexis returned to the third floor.
9:25 a.m. - Law enforcement shoot and kill Alexis on the third floor.

[Yahoo!]