Making his way to another floor. In the video, you see him hiding behind a wall, before running towards people in the background. Two of the fbi responders were teams with the metropolitan police officer. When the three were fired upon by the shooter. Reporter the shooting lasted more than an hour before alex sis shot and killed. This is the gun fbi agents say alexis used in the shooting with several handwritten etchings, saying, quote, better off this way, quote, understand to the torment , and quote, not what y all say. A backpack with the weapon was in the rest room. Reporter evidence collected as of today shows signs of a delusional man. There are multiple indicators that alexis held a delusional belief that he was being controlled or influenced by extremely low frequency, or e. L. F. , electromagnetic waves. Reporter Officials Say alexis acted alone and had a valid pass to gain entry into the building. Hooferl able to obtain a firearm two days before he carried out an attack that