David Brown convinced his 14-year-old daughter Cinnamon Brown to kill her stepmother, Linda Brown. Then he seduced Linda's younger teenage sister and sent his daughter Cinnamon to prison while he collected million-dollar life insurance policies. This is a case study of David Brown, a six time husband, truly sociopathic criminal mastermind, remorseless sex predator and red collar criminal.

Colorado dentist James Craig allegedly murdered his wife, Angela, by slipping arsenic and cyanide into her pre-workout smoothies. Police say Dr. Craig was sexting his mistress, shopping for poison on Amazon...and hiding a lot of other dark secrets.

After Heidi Firkus was shot in the back killed during an early morning home invasion, the town of St. Paul, Minnesota was terrified that there could be a crazed killer on the loose. But her husband, Nick Firkus, was hiding secrets about financial fraud, and a foreclosure, in a case that took 13 years to get justice.

Property tycoon Scot Young had a £700 million fortune, partied with supermodels...and plunged from his fourth-floor flat onto iron spikes. Did a messy divorce and bad business decisions cause him to take his own life, or was he murdered by the Russian mafia? Follow the money trail that leads around the world and links to a mysterious UK suicide cluster, political assassinations, and the Panama Papers.

Housewife Shirley Carter is brutally murdered in her rural Iowa farmhouse in a case involving a secret affair, a civil AND a criminal trial, millions of dollars and an epic battle between Shirley's husband Bill Carter and her son Jason Carter...with each accusing the other of murder.

A team of masked men kicked down the door of Byrd "Bud" Billings and his wife Melanie in Beulah, Florida - which ended with their execution-style murders. Police chase down leads including a mysterious red van, rumors of Mexican mafia involvement, and the financial dealings of a local businessman with some controversial secrets.

After mother-of-three Ana Walshe disappears on New Year's Eve, the investigation centers on her husband Brian Walshe's art fraud, fake Andy Warhol paintings, and a theory that he decapitated her in the basement.

After the body of 71-year-old child psychiatrist Dr. Thomas Burchard is discovered in the Las Vegas desert, detectives try to unravel the relationship between Dr. Burchard and his "sugar baby", a 25-year-old former Playboy model.

After Portland lawyer Lori Deveny stole $4.5 million dollars from her most vulnerable clients, her husband Bob died under very mysterious circumstances.

When a woman with links to multiple lovers - including the prosecutor AND his son - and drug dealers and was beaten to death, everyone in Madison County, Arkansas became a suspect. She was a woman who every man loved, and every woman loved to hate. Who killed Billie Jean Phillips?

Scott Kimball, FBI agent turned white collar serial killer, is charged with four murders - including his girlfriend's daughter and his own uncle - and detectives fear that there be more bodies still out there.

After a brilliant scientist is beaten to death, police investigate rumors of skinny-dipping female killers and a shady business partner who claimed that he could turn algae into biofuel.

Thomas Montgomery, a 47-year-old married father impersonates a young Marine and embarks on a steamy online relationship with an 18-year-old high school senior with the screen name TalHotBlonde. But after Thomas gets into a love triangle with his 22-year-old co-worker Brian Barrett, his obsession with the teen gets out of control...and this case of catfishing turns deadly.

Catherine explains how to verify a doctor's medical license and board certification, plus explores the dangers and risks of surgical centers.

Dr. Anthony Pignataro, plastic surgeon and inventor of the snap-on toupee, was maiming patients and poisoned his wife. What other secrets was he hiding in his basement operating room?

BONUS CONTENT: Catherine talks about what to do if you are facing the "gray area" in dealing with a suspected con artist. Also: What can you do if you suspect that someone is faking a pregnancy?

From the 1991 murder of 18-year-old Terra Ikerd and kidnapping of her baby, Heather, to the present-day murder of Reagan Hancock, who was attacked with a hammer before her unborn baby was cut out of her stomach with a scalpel, we do a deep dive into fetal abductions. What do these "womb raiders" have in common?

New mother Iana Kasian was found scalped, tortured and mutilated in the apartment she shared with her boyfriend, graphic novelist Blake Leibel.