SACRAMENTO, Calif. (AP) — A state investigation finds that California prison employees are not being as thoroughly investigated over allegations of wrongdoing since a federal judge stopped supervising the prisons two years ago.

The report by the state inspector general says officials are taking too long to report problems and complete investigations.

For instance, it took two years before investigators recommended prosecutors file charges against a psychiatric technician accused of having sex with an inmate and smuggling mobile phones, tobacco, and narcotics into the prison in exchange for money.

The report released Tuesday cites "disturbing trends" in prison investigations.

It comes as Gov. Jerry Brown is trying to persuade federal judges that California prisons have improved so much that they no longer need court oversight.