An Easter family holiday ends in tragedy when a truck collides with a car towing a caravan, killing a 12-year-old boy. The truck driver fails to stop. With no license plate number and little to go on, the collision team painstakingly examined all the debris and damage to help them track down the driver of the hit and run truck. Forensics and a miracle from above took them from 160,000 trucks to just one. The episode includes the interview with the suspect.