CHARLOTTE

year Keith Lamont Scott earlier this week. His family was shown the footage Thursday and demanded that police release it to the public. The family’s lawyer said he couldn’t tell whether Scott was holding a gun.

But Charlotte-Mecklenburg Police Chief Kerr Putney said earlier in the day that releasing the footage of Scott’s killing could undermine the investigation. He told reporters the video will be made public when he believes there is a “compelling reason” to do so.

“You shouldn’t expect it to be released,” Putney said. “I’m not going to jeopardize the investigation.”

Charlotte Mayor Jennifer Roberts waited until Thursday’s protests were underway for more than an hour before signing documents for the citywide curfew that runs from midnight to 6 a.m. The curfew will last for multiple days until officials determine the emergency has passed.

In an interview with CNN, Roberts said she thought the curfew was the most effective way to maintain peace in the city.

Charlotte is the latest U.S. city to be shaken by protests and recriminations over the death of a black man at the hands of police, a list that includes Baltimore, Milwaukee, Chicago, New York and Ferguson, Missouri. In Tulsa, Oklahoma, on Thursday, prosecutors charged a white officer with manslaughter for killing an unarmed black man on a city street last week.

In Charlotte, scores of rioters Wednesday night attacked reporters and others, set fires and smashed windows of hotels, office buildings and restaurants in the city’s bustling downtown section. The NASCAR Hall of Fame was among the places damaged.

Forty-four people were arrested after Wednesday’s protests, and one protester who was shot died at the hospital Thursday; city officials said police did not shoot the man and no arrests have been made in 26-yearold Justin Carr’s death.

Police have said that Scott was shot to death Tuesday by a black officer after he disregarded loud, repeated warnings to drop his gun. Neighbors, though, have said he was holding only a book. The police chief said a gun was found next to the dead man, and there was no book.

Putney said that he has seen the video and it does not contain “absolute, definitive evidence that would confirm that a person was pointing a gun.” But he added: “When taken in the totality of all the other evidence, it supports what we said.”

Justin Bamberg, an attorney for Scott’s family, watched the video with the slain man’s relatives. He said Scott gets out of his vehicle calmly.

“While police did give him several commands, he did not aggressively approach them or raise his hands at members of law enforcement at any time. It is impossible to discern from the videos what, if anything, Mr. Scott is holding in his hands,” Bam- berg said in a statement.

Scott was shot as he walked slowly backward with his hands by his side, Bamberg said.

The lawyer said at a news conference earlier in the day that Scott’s wife saw him get shot, “and that’s something she will never, ever forget.” That is the first time anyone connected with the case has said the wife witnessed the shooting. Bamberg gave no details on what the wife saw.

Roberts, who also watched the footage of the shooting, was asked by CNN whether she saw Scott hold- ing a gun.

“It is not a very clear picture and the gun in question is a small gun. And it was not easy to see … so it is ambiguous,” she replied.

Experts who track shootings by police noted that the release of videos can often quell protest violence, and that the footage sometimes shows that events unfolded differently than the official account.

“What we’ve seen in too many situations now is that the videos tell the truth and the police who were involved in the shooting tell lies,” said Randolph McLaughlin, a professor at Pace University School of Law. He said it is “irresponsible” of police not to release the video immediately.

Other cities have released footage of police shootings. Just this week, Tulsa police let the public see video of the disputed Sept. 16 shooting, though the footage left important questions unanswered.

The police chief acknowledged that he has promised transparency in the investigation, but said, “I’m telling you right now, if you think I say we should display a victim’s worst day for consumption, that is not the transparency I’m speaking of.”