There are several videos that were released. We must be looking at two different ones. The one I saw, in part, is at
Sun Sentinel. Peterson and a school employee are standing talking. Suddenly they look in the direction of the gunfire. They hop in the golf cart and drive off. Different camera angles show them going to the building. Then another camera shows them going to the building. The school employee goes in, but Peterson stays there. According to the article, he stayed there for about 25 minutes.