A New Jersey state policeman, who had previously been tasked with protecting the governor, shot and killed his ex-girlfriend and her new boyfriend.

A New Jersey State Trooper -- once entrusted with protecting the governor -- gunned down his ex-girlfriend and her new boyfriend before killing himself.

Jeannine Semanchik, the victim's mother, said her daughter tried to alert authorities about her unstable ex-boyfriend, but no action was taken to ensure her safety.