By Brad Segall

NORRISTOWN, Pa. (CBS) — The Montgomery County coroner has released the results of an autopsy done over the weekend on the pregnant woman who was shot and killed Friday afternoon.  She was the wife of a Pennsylvania state trooper.

Dr. Walter Hofman, the coroner, says JoAnne Miller was 22 or 23 weeks pregnant when she was killed by a single gunshot blast to the head inside her home in the 3000 block of Stony Creek Road, in East Norriton (see previous story).

She was rushed to the hospital, where doctors performed an emergency Caesarian section to try to save the baby’s life, but Hoffman says the fetus died of a lack of oxygen, never having a heartbeat or breathing on its own.

“We have determined the manner of death of both the mother and the child,” he told KYW Newsradio today, “but I cannot release that at this point in time.”

That information, he says, will come from the district attorney’s office, which today would say only that the investigation into the shooting is continuing.

Initially, authorities at the scene indicated it may have been an accidental shooting.  Miller’s husband, Joseph, is a state trooper stationed at the Skippack barracks.