Chief Flynn also confirmed that the 24-year-old officer who shot Mr. Smith was black, but he did not release the officer’s name.

“He happens to be African-American, with several years of experience, and he’s a very active officer,” Chief Flynn said. “And we are concerned for his safety.”

Saturday’s shooting and the subsequent outburst came as communities across the nation scrutinize what many see as the excessive use of force by law enforcement, particularly against black people.

In Sherman Park on Sunday, many expressed similar concerns of overly aggressive policing.

Mr. Lebourgeois said that he did not condone violence and that he advocated cooperation with the police, but he also remarked: “It seems to me they’re doing a lot of shooting people. I don’t know if these guys are bringing it on themselves or not. That’s why I just try to stay out of the way. But I know nothing like this is happening on the south side.”

On Sunday afternoon, about 100 people, most of them black, held a peaceful demonstration — holding hands and praying — in front of O’Reilly Auto Parts, one of the burned-out businesses.