Shayna Hubers called 911 to report she had killed her boyfriend, Ryan Post on, in self-defense after he attacked her. However, investigators soon learned he was planning a date with another woman and suspected Shayna killed him in a jealous rage.

When single mom Nicole 'Nikki' Vanderheyden is found naked, beaten and strangled in a Green Bay, WI, farm field, police immediately arrest her live-in boyfriend, Doug Detrie, who waited 18 hours to report her missing and has a history of domestic violence. However, as the investigation unfolded, a man she met at a bar became a prime suspect.

When the body of single mom and former policewoman Taylor Wright was discovered buried on a remote Pensacola, FL, farm, detectives had a lineup of suspects to investigate including her ex-husband, her new girlfriend, and her best friend.

For decades, the mystery of Michelle Martinko's murder in the mall parking lot in December 1979 haunted her family and the town of Cedar Rapids, IA, as police searched for her killer without success; the case went cold. 39 years later, through creative detective work and modern investigative techniques, the case took a new twist, leading to an arrest and first-degree murder charges in a long awaited, dramatic trial.

When Shirley Carter was found murdered in her farmhouse kitchen in Licona, IA, her abusive husband Bill was considered a prime suspect. But Bill pointed the finger at someone else – their son Jason, who had found her body and called 911. It was up to the jury to decide who to believe.

Carlisle, OH, high school senior Skylar Richardson told no one of her pregnancy. However, when a newborn's body was found buried in the family's backyard, Skylar was charged with murder.

Dr. Teresa Sievers was a rising social media star when she was found bludgeoned to death in her kitchen in Bonita Springs, FL. Detectives quickly came to focus on her husband Mark, who had taken out a large life insurance policy on his successful wife, in a murder for hire scheme.

An investigation into the murder of Clauddine 'Dee Dee' Blanchard, who is found face down in the bedroom of her house just outside Springfield, MO, in June of 2015.

In Iowa, hog farmer Todd Mullis claimed his wife, Amy, fell on a four-pronged corn rake; she was found by her teenage son and they raced to the hospital where she was pronounced dead. But when investigators found more than four holes in Amy Mullis' body; they knew her death was no accident.

When Richard Smith failed to show up for work, police discovered the murdered bodies of Smith, his mother and brother in their home in Pensacola, FL. Sheriff's deputies told the media they were investigating possible ritual links to the Wiccan religion and the timing of the killings with the "blue moon sky."