The Hunterdon County Prosecutor’s Office said Thursday it took over the Franklin Township Police Department less than a week after New Jersey State Lt. Ricardo Santos shot and killed Semanchik, 33, and her new beau,

A New Jersey State Police sergeant fatally shot his ex-girlfriend and her boyfriend before killing himself, Hunterdon County prosecutors say.

An investigation into the shooting deaths of two people and the apparent suicide of a suspect, a state trooper, “raised serious concerns” from the county prosecutor’s office.