Real Name: Chansami and Abby Thammavong
Nicknames: No Known Nicknames
Date: August 6, 1998
Details: The Thammavong family were driving through Arizona with a U-haul trailer in August 1998 when they were hit from the back by a big rig truck. The family was taken to the hospital, and the two young daughters, Chansami and Abby, died as a result of the accident. Police have been unable to locate the driver of the truck.
Suspects: The suspect's vehicle was a blue/white GMC.
Extra Notes: This segment originally aired on the April 16, 1999 episode of Unsolved Mysteries .