Mark Winger shoots Roger Harrington, the man who bludgeoned his wife Donnah to death with a hammer. But is he really the hero he's made himself out to be?

Instead of going to the boardwalk in Ocean City, Maryland for the nightlife, serial killer couple Erika and BJ Sifrit are there to find victims.

This husband's taste for splashing his cash on escorts comes back to haunt him when people associated with his ladies get wind of the amount of cash he likes to splash.

BFF's Robyn Little Davis & "Sissy" Saltzman are two peas in a pod. But this unholy union is fueled by greed, envy and manipulation.

Returning from the club, young Eva Hartmann came home to find her father, Werner in his bedroom. Unfortunately she found him murdered, naked, and lying in a pool of blood.

Kelly Lovera was murdered in the back of his truck, when the police told his wife, they got a reaction that they were not expecting.

While in a cop car immediately following their arrest, Rachael Mullenix reassures Ian Allen that if he says she wasn't involved in the crime that she would come visit him in jail.

In Yakima, Washington, high school athletic director "Gabby" Moore turns out winning teams and championship athletes. But when two of Gabby's protégés are unexpectedly drawn into his personal life a deadly game of love, loyalty, lust and betrayal ...

Kent Walker, son of convicted killer Sante Kimes, talks about the good and the bad times with his mother.

Learn how miniatures were used to create the immersive set of Murder Book in this behind-the-scenes video.

Cold case detectives track a sadistic killer suspected in the deaths and disappearances of at least two women, and find his secret log of murder.

Investigators explain what a murder book is and how crucial it is to solving a cold case.

In 1977, high school senior Mary Quigley is found raped and murdered in her hometown of Santa Clara, California. Her murder book begins as detectives photograph the crime scene, trace her activities, and interview everyone she was with that night.

Beauty queen Darlene Doskocil always wanted the easy way out.

Want to know whatever happened to Jennifer Reali, this Deadly Woman? Pat Lalama fills you in on the details.

Some women can’t resist boy toys. But fur flies when these women reveal they're "Killer Cougars.” 39-year-old Dr. Shirley Turner exposes some skeletons in her closet: a history of affairs with younger men all ending in rejection that Shirley could not handle.