SALT LAKE CITY (AP) -The remains of Lori Hacking, the young woman allegedly killed by her husband, were so broken up by the time police recovered them from a landfill that authorities may never know how she died.

Autopsy findings released Wednesday confirmed Hacking’s identity from dental records, but said experts couldn’t determine the cause of death.

Her husband, Mark Hacking, who reported his wife’s disappearance and asked for volunteers to search for her, was jailed on a murder charge after allegedly confiding to his brothers that he shot her while she slept and threw her body in a trash bin.

Authorities believe Lori Hacking, a 27-year-old stockbroker’s assistant, was killed July 19 after learning her husband wasn’t enrolled in medical school in North Carolina, the reason he had given for moving there. It was among a series of deceptions he had perpetuated over several years, police say.

The uncertain autopsy will not affect how Mark Hacking, a 28-year-old hospital orderly, is prosecuted for murder, Deputy District Attorney Robert Stott said Wednesday in a statement.