The body of a 12-year-old girl who disappeared last week was found buried at a farm where she liked to visit horses, and a farmhand was charged in her death, authorities said.

Gabrielle Bechen was reported missing Tuesday after she went riding on her all-terrain vehicle near her family's home in southwestern Pennsylvania.

Her body was found late Saturday, state police said. The ATV she had been riding was found partially buried at a large manure dump site about a mile from her body.

"Once the quad was located, there were several cadaver dogs that were brought in and they searched other areas around the farm, which led us to the location where ultimately Gabby's body was found," Trooper Joseph Christy said.

Authorities charged Jeffrey Robert Martin, a 48-year-old caretaker at the farm, with homicide, assault and tampering with physical evidence.

Bechen had visited the farm several times in the past to see the horses, and it's likely Martin and the girl knew each other, Christy said.

Officials did not release a cause of death. An autopsy was scheduled for Monday.

Search teams from West Virginia, Maryland, Virginia, Delaware and the Washington, D.C., area had joined local authorities and volunteers in looking for the girl.