Guardian Angels on patrol

Guardian Angel Martel Curtis monitors activity at the CTA red line stop at Chicago Avenue and State Street in Chicago on Thursday, one of many official and unofficial responses to reports of youth violence in the downtown area. Read more >> (Chris Sweda, Chicago Tribune / June 9, 2011)

The Guardian Angels, the volunteer CTA watch group, will hold a free self-defense class Sunday in the wake of a reported sexual assault at a North Side bus stop earlier this month.

The class will be held 2 to 5 p.m., at 1552 W. Schreiber Ave., according to a news release by the Guardian Angels.

The Angels say today they will hand out flyers about the attack, which was reported to have occurred May 2 at about 2 p.m. A woman said a man grabbed her as she waited at a bus stop at Clark and Devon Avenues, dragged her to a nearby alley, assaulted and robbed her.

Her family is offering a $5,000 reward for information about the attack that leads to arrest, according to the Angels release.

The Angels will pass out flyers about the attack and reward from 2 to 6 p.m., at the corner of Clark and Devon Aves.

Police describe the attacker as a 5-foot-8, 300-pound black man with short black hair. He was wearing a striped polo shirt and blue jeans at the time.

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