A high school student accused of participating in the attack of another student pleaded guilty to assault on Monday.
Andres Vasquez, 18, was one of several Sahuarita High School students accused of holding down a fellow student and pulling down his pants in January.
At least one of students exposed himself to the victim and committed a lewd act on the victim, police said at the time.
Vasquez is scheduled to be sentenced for the misdemeanor offense on October 25.
Three other students charged in the incident have not accepted plea agreements.