Mr. Kenney, the mayor, said he had watched “the video of this tragic incident” and spoken with Mr. Wallace’s family “to hear their concerns firsthand, and to answer their questions to the extent that I am able.”
The city’s police commissioner, Danielle Outlaw, said in a statement, “I recognize that the video of the incident raises many questions.” She added, “I will be leaning on what the investigation gleans to answer the many unanswered questions that exist.”
In a statement, the Council member who identified Mr. Wallace, Jamie Gauthier, said she wanted the police to “immediately” release the officers’ body camera video from the incident. “The public deserves a full, unvarnished accounting of what took place today,” she said.
Ms. Gauthier also criticized the officers for firing their weapons. “Had these officers employed de-escalation techniques and nonlethal weapons rather than making the split-second decision to fire their guns, this young man might still have his life tonight,” she said.
District Attorney Larry Krasner said his office was looking into the shooting and urged the public to be patient.
“We intend to go where the facts and law lead us and to do so carefully, without rushing to judgment and without bias of any kind,” he said in a statement. “In the hours and days following this shooting, we ask Philadelphians to come together to uphold people’s freedom to express themselves peacefully and to reject violence of any kind.”
At around 9:30 p.m., protesters were marching through the streets of West Philadelphia, with a parade of vehicles honking behind them. Just after 11 p.m., video posted on Twitter showed police officers using batons as they clashed with a large group of people on a residential street. Taryn Naundorff, 21, who recorded the video, said the police “started forcefully pushing back the crowd and beating anyone who wouldn’t back up.”