In Miami, a mechanic is shot to death in his shop. Detective Juan Hererra and his team focus on why someone would want the victim dead. (S6, ep 11)
In Memphis, a well-loved neighbourhood investor is shot, and the only eyewitness is a young girl on her way home from school. (S5, ep 11)
In Dallas, Detective Phil Harding investigates a brutal shooting in a motel and, in Memphis, Sergeant Ron Collins must track down a murder suspect. (S6, ep 10)
In Memphis, Tennessee, Sergeant Caroline Mason takes it personally when a 75-year-old man is shot dead in her old neighbourhood.
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)