Kill Now, Pay Later: When an arrest is made in the contract killing of a California businessman, police discover that's just the beginning of the story. (S8, ep 11)
Nightmare Field: Investigators search for 23-year-old Dalene Carlson after she is reported missing. But then a tractor operator makes a gruesome discovery in a cornfield. (S7, ep 11)
Dead End Trail: Fear grips the students of Southern Illinois University when the body of senior Susan Schumake is discovered near a popular campus trail. (S6, ep 11)
Little Boy Lost: When the body of 11-year-old Christopher Alan Brown was found in the Flint River in 1985, it took almost 20 years for evidence of his murder to be found. (S5, ep 11)
City Under Siege: Detectives in Arizona investigate whether a 20-year-old woman could be the latest victim of an unstoppable gunman's shooting spree. (S4, ep 11)
Deadly Denial. When a gun advocate is murdered in her home, detectives suspect the victim knew her attacker. Can forensic evidence point them to the killer? (S3, ep 11)
End of the Line: When a first-year college student is raped and murdered, it takes a rookie cop to beat the odds and catch a killer. (S8, ep 10)
Flames In Paradise: Detectives encounter a rogue's gallery of suspects and outlandish leads on their way to finding the killer of telemarketing manager David Stevens. (S7, ep 10)
Sinister Secret: In rural Wyoming, a young teen is found strangled after vanishing from her group home. Relentless investigation reveals the killer's shocking identity. (S6, ep 10)
Dangerous Fortune: Police are baffled when the bodies of fortuneteller Ha Jade Smith and her daughter Anita Vo are found with white paint covering their head and hands. (S5, ep 10)