Near a local deli on Thursday, Jessica Rodriguez, 34, said Mr. Graham had offered to pick up coffee for her every morning. "When I bring my kids to school, he's getting a peppermint tea," she said. "He played football in the backyard with my kids."

At the deli, a group of boys gathered, blasting a Jamaican song from a small set of speakers. The lyrics chronicled the death of a young man at the hands of the police, they said.