Kill or Be Killed

Stories of couples who commit terrible crimes after their relationships devolve from love into manipulation, including what ultimately leads to a fatal breaking point.

Deep into some of the most chilling murder cases in New York City's recent history.

Hosted by Lt. Chris McMullin, the 10-Episode docuseries delves into the most harrowing murders committed in one of the country’s most historic regions.

In towns across America, both large and small, there are thousands of unsolved murder cases that have gone cold. With the right resources, though, it is possible that many of these cold cases can be re-opened and solved, bringing dangerous criminals to justice and providing closure for the families of their victims.

The focus is on women who manipulate men to commit criminal deeds in this true-crime entry in the "Snapped" franchise.

Among serial killers, Israel Keyes is an enigma. When police picked him up in Texas in March of 2012, it was for the murder of 18-year-old Samantha Koenig, whom he had brazenly kidnapped from a coffee stand in Anchorage, Alaska. Once in custody, however, he confessed to other murders and bank robberies and alluded to many more crimes. He ultimately claimed to have killed up to 11 victims between 2001 and 2012, but couldn't - or wouldn't - tell the authorities exactly when and where. He told them enough, however, for them to take him seriously. Then, in December 2012, after nine months in custody, he killed himself, taking his secrets with him to the grave.