Dave Bremer was on his way home from Bible study Saturday night when he ran into the rear of the minivan in front of him. What Orlando police say happened next shocked Bremer — and, he said, left him with injuries so severe that he'll need time to recover before he can go back to work as a contractor. A man later identified as Orlando District Fire Chief Melvin "Rob" Rivenbark Jr. — wearing his uniform — jumped out of the van, reached into the Jeep, grabbed Bremer by the hair and slammed his head into the side of the Jeep, according to police