Motel Massacre: A hotel in Memphis becomes a warzone when a gunfight breaks out, and in Kansas the murder of a two-year-old sparks a manhunt for an eight-year-old killer. (S4, ep 52)

Detective Rolly Garcia investigates the murder of a 17 year-old boy beaten to death and dumped in a car. And, in Dallas, a man is found dead in a car park. (S6, ep 9)

Detective Manny Castillo investigates a brutal double homicide. The key to the case could be a surviving third victim, who is clinging to life after being shot several times.

Family Affair: A young woman is brutally murdered - could the killing be personal? (S4, ep 51)

Detective Ponce and Sgt Melancon unravel the mystery of a man found shot dead in his car. Could a stolen mobile phone hold the key to cracking the case? (S6, ep 8)

Last Dance: A look at how Virginia detectives used science and cunning to catch the killer of 16-year-old ballet dancer Meghan Landowski in 2008. (S7, ep 4)

Murder in Room 348: When business traveller Greg Fleniken is found dead in his hotel room, all signs point to a heart attack. But police soon realise he has been murdered. (S6, ep 4)

Driven To Murder: Detectives encounter a huge cast of shady characters as they investigate the execution of a millionaire. Could his murder have been a professional hit? (S5, ep 4)

Wolf in Sheep's Clothing: Detectives uncover the shocking truth behind the disappearance of an eight-year-old girl who was abducted close to her home in California. (S4, ep 4)

Murder On Miguel Lane: When three teenage friends were found murdered in Arlington in 1985, a thorough forensic investigation turned up a highly unlikely culprit. (S3, ep 4)