SPRINGFIELD, Mass. - Police say a corrections officer from Long Island shot and killed a Springfield, Mass. officer during a domestic dispute and then killed himself.

Charlene Mitchell, 29, called police yesterday afternoon, saying she feared for her life because of her ex-boyfriend Sean Bryan. Police say Bryan was a Rikers Island corrections officer from Hempstead.

According to police, Mitchell, who had a child with Bryan, had a restraining order against him. Officer Kevin Ambrose responded to Mitchell's apartment and let Bryan in to get some personal belongings. That's when police say Bryan shot and killed the Springfield cop.

Police say Ambrose was a 36-year veteran of the Springfield Police Department. He was employed as a police cadet prior to becoming an officer and had served the city for 38 years. According to police, Bryan shoved Mitchell inside her apartment, before slamming the door behind him. Bryan then allegedly shot Ambrose through the door, and then opened it before shooting him a second time. Police say Bryan went back inside the apartment and shot his ex-girlfriend, before returning to his car and shooting and killing himself. Mitchell remains in critical condition in a Massachusetts hospital.