Former beauty queen Tara Lambert hires a "hitman" to kill her husband's ex-wife without knowing that she is being recorded on camera because she is actually talking to an undercover cop.

Kelsey Berreth, a young Colorado mom, disappears on Thanksgiving Day and was last seen on grocery store surveillance with her baby. Police soon uncover a brutal crime scene at her home and expose a twisted love triangle.

Robert Lee 'Hank' Dawson was murdered in 1993 a car-bomb explosion in Alaska. Investigators tirelessly interview suspects and collect local videos to eventually zero in on the perpetrator.

Barbara Kendhammer suffers fatal injuries after a heavy pipe impales the windshield of her car, but evidence at the crime scene tells a different story.

10-year-old Zahra Baker survived cancer twice but lost her leg and hearing. When she disappears from her bedroom in the middle of the night, investigators are puzzled by a ransom note left at the scene, but Zahra's fate is worse than they could have ever imagined.

A young mom of two perished in a raging house fire, but her autopsy reveals the cause of death was not asphyxiation but a bullet wound to the head. Forensics uncover the killer.

27-year-old Sasha Samsudean appears to be sexually assaulted and is found strangled in her luxury downtown Orlando, Florida apartment. The security guard, Steven Duxbury, tells detectives that he saw Sasha with a "mystery man." Surveillance video ultimately leads investigators to the killer.

A tip leads the authorities in Moore, Oklahoma to a Super 8 hotel where they find a missing underage boy and a married state senator, Ralph Shortey, just days after Shortey pleaded guilty to child prostitution and pornography charges.

"Loving" father Chris Watts turns into one of the nation's most notorious killers overnight when he murders his pregnant wife and his two young daughters. Secret videos document a series of chilling murders from start to finish, revealing lies, a scandalous affair and a shocking cover-up.

The murder of Yeardley Love took place on May 3, 2010 in Charlottesville, Virginia. Love, a University of Virginia (UVA) women's lacrosse student-athlete, was found unresponsive in her Charlottesville apartment on May 3. Later that day, UVA men's lacrosse player George Wesley Huguely V was arrested by Charlottesville Police. Huguely was tried and found guilty of Love's murder.

Shayna Hubers and Ryan Poston seemed like a match made in heaven, until he ends up dead in a pool of blood, shot in the face. Stunning interrogation tapes leave cops in disbelief and lead investigators to a surprising motive.

On July 22, 2015, authorities arrest Michael Bever and his brother Robert Bever for the murder of five people. Authorities discover the bodies of 52-year-old David Bever, 44-year-old April Bever, a 5-year-old girl, a 7-year-old boy and a 12-year-old boy inside the family's home.

Prominent realtor Todd Kohlhepp's double life is exposed when police launch a dramatic rescue of a young woman, Kala Brown, chained like a dog inside a shipping container on his property.

Terri "Missy" Bevers, age 45 and a fitness instructor, was killed while preparing for a morning workout class at the Creekside Church of Christ in Midlothian, Texas. CCTV recorded her killer on video, wearing a "fake" SWAT police uniform, but the case remains unsolved as of 2019.

Eight-year-old Cherish Perrywinkle is lured out of a Walmart store by a registered sex offender, but that's just the beginning of a night of terror, all caught on camera.

Young mom of two, Kelley Stage, is found brutally murdered in her home after her husband returns from a night of poker. Her young child witnesses the crime and reveals shocking details to investigators.

Stephen Paddock, the 2017 "Las Vegas shooter," is spotlighted. He opened fire into a crowd of approximately 22,000 concertgoers who were attending a country music festival on the Las Vegas Strip. Paddock committed suicide in his hotel room shortly after the shooting.

Sarah Stern vanishes just before Christmas in 2016, and her car found abandoned by the Shark River. The missing persons case soon turns into a homicide and cops start focusing on her childhood friend, Liam McAtasney.

Lululemon employee Jayna Murray is found stabbed to death inside one of the company's Washington, DC stores. Her co-worker is bound and bleeding in a room. As different suspects emerge, evidence starts to point to someone on the inside.

A pregnant 22-year-old, Savanna LaFontaine-Greywind, disappears from her Fargo, North Dakota apartment in 2017. When the baby turns up alive, the investigation reveals a suspect close to home.