Courtney claims it was her lover Michael's idea to kill her father with a baseball bat when she was just 16.

In 2001, Loyd and Agnes Courtney were beaten and stabbed to death. Did their daughter really do it?

New Year's Eve ends in triple homicide when Twila Busby and her two adult sons are found dead at home. Her boyfriend Hank Skinner is found guilty, but claims he is innocent.

In 2 months, 20 patients at a Texas hospital are murdered. Meet nurse Vickie Jackson, the "Angel of Death", on duty at every attack, who was sentenced to life with no parole.

Ana Trujillo claims it was self-defense when she bludgeoned her boyfriend Stefan Andersson to death with a 5-inch stiletto heel, but a jury found her guilty of murder.

Popular radio announcer George Weber is discovered stabbed in his bedroom. He met his killer, 16 year old John Katehis, on Craigslist. Now Candice DeLong goes one-on-one.

Earl and Melissa are found guilty of killing two elderly people and sentenced to life - but Melissa says she's a victim too. Is she lying?

What made this young mom snap? Candice DeLong digs deeper.

Police are puzzled when the body of Patrice LaBlanc surfaces in a nearby lake. Her boyfriend Cliff Youens, also known as drag queen Brandi West, is found guilty.

Candice DeLong unravels years of abuse, but can it ever justify murder?

After Larry Swearingen was arrested, his victim Melissa was still alive, left for dead for 20 days.

Britney Gulley has trouble remembering killing her first victim, because she was so high.

Charles Dean Hood is convinced that he was nowhere near the crime scene but, there is a voice recording of him there.

Ivan Martinez witnessed somone stab Barry Horn 69 times. But is he lying about just being a witness?

Sylvilla Humphrey tried to just use her gun to scare away her attacker, but instead, she pulled the trigger.

Ron Samuels is covinced that everyone involved in the murder of his wife Heather, turned on him to save themselves.

Britney Gulley has trouble remembering killing her first victim, because she was so high.

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.

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.

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

Jeanne Harrington’s marriage to Michael Gabel was on the rocks. The couple were constantly fighting and instead of talking it out Jeanne took things into her own hands… in more vicious ways.

Lizzie Borden, American most infamous murderess. Born into a wealthy respected family, Lizzie was a quiet, Sunday school teacher - that is until she took an ax and hacked her stepmother and and father to death. Or did she?

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.

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

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

Beauty queen Darlene Doskocil always wanted the easy way out.