BOISE, Idaho (AP) — The Idaho attorney general’s office is calling for a criminal investigation into Correction Corporation of America’s understaffing of the Idaho Correctional Center after learning that a police investigation announced last year was never done.

Attorney General Lawrence Wasden wrote the letter to Idaho Gov. C. L. “Butch” Otter and the heads of the state police, Department of Correction and the Ada County prosecutor’s office Friday. The Associated Press obtained the letter through a public records request.