SACRAMENTO -- Sacramento County prosecutors have filed corruption charges against two former employees of the Sacramento Public Library and the wife of one of them.

Dennis Nilsson of Folsom, and Sacramento residents James Mayle("MAY-lee") and his wife, Janie Rankins-Mayle, are charged with grand theft and bribery. Nilsson and Mayle, the library's former security director, also face conflict-of-interest charges.

All three were booked into county jail on Wednesday.

The charges allege that a company owned by Rankins-Mayle overbilled the library while doing $1.3 million worth of routine maintenance. A library investigation found the cost should have been half that amount.

The charges allege that Nilsson and Mayle steered contracts to the firm owned by Mayle's wife. Prosecutors say Nilsson, who was the library system's maintenance supervisor, approved the contracts with the inflated billing and received kickbacks of more then $90,000.

Dan Karalash, an attorney representing Nilsson, said he could not comment because he had not yet seen the prosecutor's case. It was not clear whether Mayle and Rankins-Mayle had obtained an attorney.