MADISON, Wis. -- School officials are taking another look at students who have been convicted of serious crimes following the alleged rape of a West High School girl at her school during class hours.

Madison school officials said Friday they will review the records of all students convicted of serious crimes to make sure they do not pose a threat to others.

Ted Balistreri, the district's security coordinator, will begin assessing juvenile delinquents when they return to school, a job principals do now.

The 16-year-old girl was walking to class in a school hallway last week when a 16-year-old boy approached her, police said. He walked with her into a nearby stairway where he sexually assaulted her, police said.

The boy, who is from Madison, was arrested Tuesday on suspicion of second-degree sexual assault, police and school officials said. The alleged assailant previously served time for stealing a car and damaging property.

The boy's 17-year-old sister was arrested Wednesday for allegedly attacking the girl involved at school. Police said she grabbed the girl's neck, punched her ear and face and kicked her after she was curled up on the ground.

In a criminal complaint, she told police she attacked the girl "because she had my brother put in jail and she was out." The sister was released Friday on a signature bond.

Balistreri, a retired Madison assistant police chief, said his knowledge of the law and court system could help the district reduce safety risks.

"The system might be working perfectly fine right now, but until we all feel comfortable with it, I'm going to take a look at (student criminal records) when they come in," Balistreri said.

The state or county notifies the district whenever a student with a criminal record returns to school, Balistreri said.

State law requires the district to educate the child unless the child has been expelled. If the district does not opt to place the child in a regular school setting, it can place him or her in an offsite alternative program or use private tutors.

Districts can also require certain students to be searched daily for weapons or to be escorted between classes by an adult, Balistreri said.