mobley waits for the perfect moment to switch positions. >> tracy mobley was the ringleader in this. no doubt she was the one who came up with the idea. she had the felony hanging over her head. mary morrissey was just here for misdemeanor traffic things, which she probably would have just gotten a fine. >> after their disappearing act, a full five seconds ticked by before a sheriff's deputy appears in the loading area. when he doesn't seem to notice anything is amiss. >> doesn't somebody watch the video while the prisoners are going on to the bus? don't they do a beginning count when they start to go out? don't they do an ending count on the bus? they would have known they were short two prisoners. >> oblivious two prisoners are underneath the bus, instead of inside it, the bus pulls out to the street. officer morris just happens to be standing steps away. >> it was pulling out exactly the way he is now with prisoners aboard like he has right now, and pulled out, and probably made it just about right there. >> incredibly, the prisoners cling to the underside of the bus for a full fi