BOISE, Idaho (AP) — Public records show an Idaho State Police investigation into staffing problems at a private prison was handed over to the FBI after police detectives determined their agency could have a conflict of interest in the case.

The apparent conflict of interest wasn't revealed earlier this year, when the state first announced the FBI would be investigating whether fraud or other crimes occurred when Corrections Corporation of America understaffed Idaho's largest prison in violation of its $29-million-a-year contract. The records were among hundreds of documents obtained through public records requests by a campaign staffer for A.J. Balukoff, a Democrat who is challenging Republican incumbent Governor C.L. "Butch" Otter for the governor's seat.

Balukoff's campaign spokesman, Mike Lanza, said Balukoff thought it was important for the public to find out more about how the state handled the investigation into understaffing at a prison run by Corrections Corporation of America.