Police said Susan Barksdale betrayed her good friend, Frank Bligh, and helped her husband, Blane, murder and steal from him, before going on the run.

Dale Moneypenny's crime spree started with a fire and ended with two murders and a nationwide manhunt.

Why did Nadya Swartz want her ex-boyfriend, Kenny Bunn, dead? One friend alleged she had a "dark, romantic fantasy" of murder.

In speaking to Liz Rogan and Anthony DePuisaye-Greene's deadly crime spree on Snapped: Killer Couples, Det. Riley McNeal said, "usually you see remorse in situations like that, and Liz is glorifying it and making it romantic in her diary."

Michael Kariakis claimed he was Charles Chumbler's son, but after Charles' wife died, investigators soon learned many around Charles believed Michael Kariakis was actually his lover.

U'Dreka Andrews claimed a revenge plot against her sister's ex, Mylon Lowe, simply went too far in Snapped: Killer Couples, but her fiancé, Danny Brown, said the deadly shooting was self-defense.

One of the suspects in Jamie Carroll's murder insinuated his partner's jealousy was the motive in a new episode of Snapped: Killer Couples.

Claiming to have abducted about 40 victims, suspected serial killer David Ray's "Toy Box" contained a vast array of heinous torture weapons. His girlfriend, Cindy Hendy, got out of prison last year. 

Kimberly and Lenorris Williams were unhappy with their marriage and believed Lenorris' ex had hexed him. So, they turned to a spiritual healer named Georgia Green — but the arrangement soon turned bloody.

After James Radcliff was killed, investigators learned his wife, Robin, had been having an affair with another serviceman.