"He came charging up the street, shooting at me... So we're about six feet apart when he ran up that driveway, and he was shooting at me and I was exchanging gunfire with him... I'm lying there and I saw the front wheels go over Tamerlan. I saw him bounce up underneath the carriage a couple of times. I saw him get hung up in the rear wheels and get dragged 20, 25 feet... All we saw was taillights at that point."