SAN ANTONIO (AP)--An Air Force instructor in Texas has been sentenced to 20 years in prison for rape and sexual assault in a sweeping sex scandal that has rocked one of the nation's busiest military training centers.

A military jury at Lackland Air Force Base in San Antonio found Staff Sgt. Luis Walker guilty Friday on charges that included rape, aggravated sexual contact and multiple counts of aggravated sexual assault.

The same jury decided his punishment Saturday.

Walker is among 12 Lackland instructors investigated for sexual misconduct with female trainees. Six have been charged.

Lackland is where all Air Force recruits go through basic training. It has about 475 instructors for about 35,000 airmen who graduate every year. While one in five recruits is female, most instructors are male.

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