When Lanell Barsock is found dead, evidence points to her boyfriend before detectives focus their investigation on best friend Larene Austin.

When police find the body of Monica Massaro in her home with 17 stab wounds, they're led to serial killer Adam Leroy Lane.

Investigating the murder of Brian McKandie. Initially deemed accidental, the handyman's death was soon considered murder due to his severe injuries.

After Gordon Wardell makes an emotional appeal to find his wife's killers, police soon realise they must look closer to home.

Examining how Howell Donaldson III terrorised a neighbourhood in Tampa, Florida in 2017, killing four random strangers.