An Air Force cadet accused of raping a fellow cadet while the two were partying in Boulder last year could spend the rest of his life in prison after being found guilty of sexual assault in a split verdict Wednesday.

A Boulder County jury convicted Daniel Ryerson, 22, of sexual assault on a victim incapable of appraising her condition, which carries a minimum sentence of 2 to 6 years in prison. Under Colorado’s indeterminate sentencing law, Ryerson could be sentenced to up to life in prison.

The jury, however, also acquitted Ryerson of charges of sexual assault on a physically helpless victim and second-degree kidnapping.

“This case was especially tragic because it involved a tragic violation of trust between fellow Air Force cadets and because of the brutal manner in which it was committed,” Boulder County District Attorney Stan Garnett said.

Ryerson was arrested in January.

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