WARWICK, Pa. (CBS) — Police say an Army Captain suspected in four killings was found dead in Bucks County.

READ MORE: Philadelphia Police Searching For Suspect Who Stole Car With 6-Year-Old Girl In Backseat

After several tours of combat duty, Leonard Egland recently returned to Virginia, where he was believed to be on active duty in the US Army at Fort Lee. But authorities say the 37-year-old went on a killing spree — taking the lives of his ex-wife, her boyfriend and her boyfriend’s young son.

Bucks County DA David Heckler says they believe Egland then drove to Buckingham Township, where he shot and killed his former mother-in-law, 66-year-old Barbara Ruehl.

After a lengthy manhunt and intense standoff with police in the area of York and Almshouse Roads in Jamison, Egland was found dead Sunday afternoon.

READ MORE: North Philadelphia Community Welcomes Home 3-Year-Old Boy After Hit-And-Run That Also Killed Mother

Police say a rifle, hand gun and ammunition were found near his body.

Though Egland was killed of an apparent self-inflicted gunshot, an investigation into his death is ongoing.

Reported by Ian Bush, KYW Newsradio, Oren Liebermann, CBS 3

MORE NEWS: Local Doctor Joins 14 World War II Veterans In Hawaii Visiting Pearl Harbor On 80th Anniversary