CASPER, Wyo. (AP) — A Wyoming man convicted of multiple sexual crimes will serve up to 75 years in prison.

The Natrona County Sheriff's Office began investigating Joshua McCullough on December 9 after staff at the Wyoming Medical Center reported that an 11-year-old girl said he had sex with her.

Court documents show McCullough described himself as a pedophile during an interview with investigators and told them about four specific sexual acts he had done with girls in the previous six weeks.

He pleaded guilty to first-degree sexual assault, second-degree sexual abuse of a minor and three counts of first-degree sexual abuse of a minor.

McCullough declined his opportunity to speak during his sentencing on Wednesday.