Monday morning, a gunman identified by police as 22-year-old Brian Isaack Clyde traded gunfire with police outside a Dallas court building. Footage shot by a onlooker from an adjacent building shows the gunman apparently shooting into the door of the Earle Cabell Federal Building before police fire upon him. Clyde, wearing a black ski mask and tactical vest, then runs across the street into a parking lot, where he reportedly collapsed after being shot. Law enforcement officers brought him to a hospital where he was pronounced dead.

Clyde’s Facebook profile reveals a series of bizarre posts and videos in which he shows off his rifle, magazines, and sword. In one video, he says “a storm is coming” without further explanation.

The suspect was apparently deeply invested in meme culture, but also interested in video games, anime, and cosplay. His profile also claims that he previously served in the U.S. Army as a Infantryman. Pictures he posted show him wearing a 101st Airborne Division patch. and one picture mentions the Rakkasans of the 101st’s 187th Infantry Regiment. According to ABC News, federal authorities report that Clyde was discharged from the military after serving less than two years.

Police officers cleared the suspect’s car, stating that it was safe. The FBI is actively involved in the investigation and reports that the area outside the court room is still a active crime scene.