The boys, who the police did not name because of their ages, were both charged with first-degree sexual abuse.

Parker pleaded guilty in January 1995 to first-degree sexual abuse of a 15-year-old girl in a stairwell at his old high school.

Barr worked a plea-bargain, and was convicted of first-degree sexual abuse.

He was charged on Monday with one count of first-degree sexual abuse, the police said.

Mr. York was charged with first-degree sexual abuse.

Authorities said all would be charged with first-degree sexual abuse and first-degree riot.

Sergeant Helbock has been charged with one count of first-degree sexual abuse.

He was also charged with first-degree sexual abuse and endangering the welfare of a child, an 8-year-old boy.

She was charged with rape, endangering the welfare of a child, and six counts of first-degree sexual abuse.

He was arrested and charged with first-degree sexual abuse and third-degree assault.