Lackland Air Force Base instructor Staff Sgt. Kwinton Estacio was acquitted of sexually assaulting a basic training graduate, but was sentenced to 12 months in prison after pleading guilty to lesser charges earlier in the week.

A Joint Base San Antonio spokesperson said along with the 1-year sentence, Staff Sgt. Kwinton Estacio would be reduced to the lowest enlisted rank, E-1, and receive a bad conduct discharge.

Estacio plead guilty to the lesser charge of wrongful sexual contact after a military judge ruled Tuesday there isn't enough evidence to support a sexual assault charge.

Military prosecutors have investigated more than a dozen instructors at Lackland Air Force Base in San Antonio and charged six.