CHICAGO (CBS) — A Chicago crisis responder is reaching out to help a boy who saw his mother gunned down in Chicago Lawn Friday.

Candice Dickerson was buying a cell phone for her son at a Metro PCS store at 59th and Kedzie when two people outside started shooting. A stray bullet killed the 36-year-old woman.

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Two of her children were with her at the time. They were in the store buying a cell phone as a reward for one of her sons receiving a good grade.

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On Sunday, Dawn Valenti, a local victims’ advocate, returned to the same store to finish what the mother of three had started.

“In my heart, I wanted to come out here and continue to do what she was going to do, which was to give [her son] a cell phone,” Valenti said. “She was trying to reward him and something terrible happened, the worst thing that could happen to anyone in their life.”

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Police have made no arrests. Anyone with information about the shooting is urged to call Chicago police.