Tooele police are investigating the discovery of a human skull inside the attic of a home.

A roofing company was doing work on a home Monday near 200 West and 100 South. Workers tore open the old layers of the roof and made the startling find inside the attic.

"It's been there for what appears to be many, many years," Tooele Police Capt. Steve Newkirk said Tuesday. "It's quite decayed."

There was some hair and tissue on the skull, but the lower jaw is missing. The skull was taken to the state medical examiner's office, where it is undergoing tests to determine how old it is, as well as any other information about who it is or how that person died.

Meanwhile, police detectives are researching former owners and tenants of the 1920s-era home to question.

"We're looking at this as a homicide until we can prove otherwise or find out where the skull came from," Newkirk said.

The skull appeared to have been placed in the attic, he said.

Cadaver dogs searched the home late Monday night but did not find any more remains or bones. Newkirk said police did not have any outstanding missing persons cases or unsolved homicides.