SAN ANTONIO » A military jury has sentenced a U.S. Air Force instructor to 20 years in prison for raping two women, including a recruit he was training two decades ago at Lackland Air Force Base in San Antonio.

The San Antonio Express-News reports the jury sentenced Air Force Master Sgt. Michael Silva on Friday, a day after finding him guilty in a 2007 rape of a woman in Wyoming and a recruit in 1995. He could have been sentenced to up to life in prison without parole.

Silva had been charged with raping three women. He was found not guilty in a rape that prosecutors said occurred in North Carolina in the early 1990s.

Dozens of instructors at Lackland have been accused of raping, sexually assaulting and abusing trainees.