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. MORE: https://www.wthr.com/article/news/crime/police-reviewing-social-media-video-wilmer-hutchins-dallas-high-school-shooter/287-99f3bf66-8f15-4fdd-9220-a24187acffff