Experts look at a subset of psychopaths who are motivated by their heightened sexual urges and fantasies. This subset of offenders doesn't just enact physical violence but sexual violence toward their victims and is known as the "sexual psychopath."

Police first arrest a man for discharging a firearm and soon discover dead bodies inside his apartment. Detectives try to make sense of the bloody crime scene and a psychopath willing to murder those closest to him.

An early morning fire inside an apartment complex soon reveals something worse? The dead bodies of a young woman and an infant boy. Detectives find a psychopath who appears polite and gentle, then later as a pawn of imagined demons.

After the shooting deaths of father, mother, and two adolescent boys in their suburban Baltimore home, investigators realize it's not a robbery gone wrong but rather the execution of a loving family, done by a callous and calculating psychopathic killer.

A killer guns down a 46-year-old woman, and detectives discover that a fleeing Sheriff's Deputy is the assailant. Less than 48 hours later, they arrest him and reveal an unrepentant psychopath capable of executing the "love of his life" in cold blood.

When a young mother goes missing, her husband joins the search. Police discover her dismembered body in a stack of bins. Detectives find her husband to be a typical suburban dad, but learn a murderous psychopath lurks within.

A vehicle plows down a 75-year-old military veteran on a country road in an apparent hit-and-run. When a young man confesses to the crime, detectives quickly learn they've encountered a psychopath with an intense desire to thrill kill.

Pensacola Police are called to the Corner Store when a killer guns down a young man in a brazen public execution in the parking lot. Police track down their suspect and find a cold-blooded psychopath without remorse.

For over three decades, Albuquerque police struggle to solve three violent cold cases. After years of searching, the cases break wide open when officers pick up a man on a probation violation. and he soon reveals himself to be a homicidal psychopath.

Authorities grow concerned when a 25-year-old woman reports her 50-year-old father and 6-year-old daughter missing. Police discover their dead bodies and uncover the shocking truth she is a psychotic killer.

Police engage in a massive manhunt to find a killer on a murder spree of revenge, taking the lives of his girlfriend, cousin, and a man he considers a father figure. Once captured, he proclaims that he simply wants to be "heard."