DALLAS — Police are investigating a video of the accused Wilmer-Hutchins High School shooter, Tracy Haynes Jr. WFAA sources say the video was filmed shortly after gunshots wounded four of his classmates.

The video was initially posted on Instagram, and our sources confirmed its authenticity Wednesday. Police have not yet revealed a motive in this case, but those sources tell WFAA they are using the clip not just to figure out what happened, but also possibly why it happened.

In the video, Haynes says, “I know I was wrong for what I did. I didn’t want to do it, but I had to do it.”

In the clip, Haynes does not specify exactly what he did. But did say he loved his nieces and nephews, and that he believed people were going to kill him.

“My mama gone, my granny gone, everybody gone that I love, so… I can’t go. I can’t go. I’d rather y’all see me like this, locked up, than y’all see me dead in the ground.” 

An arrest affidavit said school surveillance cameras showed an unidentified student let Haynes in an unsecured door. Haynes walked the hallway until he saw multiple male students in the hallway, displayed a firearm and began shooting at the students indiscriminately, the affidavit said. Five students were shot, according to the affidavit, but Dallas Fire-Rescue officials later clarified that one of those students was not shot and had instead suffered anxiety-related symptoms.

Haynes then approached one student who could not run and “appeared to take a point-blank shot,” the affidavit said.

Haynes was charged with aggravated assault mass shooting, according to his arrest warrant affidavit and jail records, a charge that didn’t exist two years ago.