In death, Mr. Gray, 25, has become the latest symbol in the running national debate over police treatment of black men — all the more searing, people here say, in a city where the mayor and police commissioner are black.

Questions are swirling around just what happened to Mr. Gray, who died here Sunday — a week after he was chased and restrained by police officers, and suffered a spine injury, which later killed him, in their custody. The police say they have no evidence that their officers used force. A lawyer for Mr. Gray’s family accuses the department of a cover-up, and on Tuesday the Justice Department opened a civil rights inquiry into his death.

But as protests continued Tuesday night — with hundreds of angry residents, led by a prominent pastor and Mr. Gray’s grieving family, chanting and marching in the streets — the death has also fueled debate on whether African-American leadership here can better handle accusations of police brutality than cities like Ferguson, Mo., and North Charleston, S.C., with their white-dominated governments.

“Unlike other places where incidents like this have happened, they understand what it means to be black in America,” said City Councilman Brandon Scott, an ally of Mayor Stephanie Rawlings-Blake and a frequent critic of Police Commissioner Anthony Batts.

“They understand how something like this can get out of hand very quickly,” Mr. Scott said. “They understand the community’s frustration more than anyone else. But at the same time they also understand the opposite — they understand the need to have law enforcement in neighborhoods. So it puts them in a bind.”

This week the mayor and police commissioner have appeared repeatedly in public promising a full and transparent review of Mr. Gray’s death. On Tuesday, the police released the names of six officers who had been suspended with pay, including a lieutenant, a woman and three officers in their 20s who joined the force less than three years ago. Officers canvassed west Baltimore, looking for witnesses.

Mr. Batts turned up in Mr. Gray’s neighborhood, chatting with residents and shaking hands. And Ms. Rawlings-Blake said in an interview that she had asked Gov. Larry Hogan for help in getting an autopsy on Mr. Gray performed by the state medical examiner made public, even piecemeal, as quickly as possible. The mayor said she supported the Justice Department inquiry.

Chanting “Black Lives Matter” and “Justice for Freddie,” protesters marched Tuesday evening on the block where Mr. Gray was arrested. The Rev. Jamal Bryant asked for a moment of silence. Mr. Gray’s relatives — including his mother, her head shrouded in the hood of a sweatshirt — paused quietly.

Mr. Gray’s arrest, which was captured on a cellphone video that shows him being dragged, seemingly limp, into a police van, has revived a debate in this city over police practices.

“We have a very challenging history in Baltimore,” Ms. Rawlings-Blake said, adding that she had worked hard “to repair a broken relationship” between black residents and the police. She called Mr. Gray’s death “a very sad and frustrating setback.”

Ms. Rawlings-Blake and Mr. Batts had been talking about the problem long before the fatal police shooting of Michael Brown in Ferguson, Mo., in August spawned national protests and the hashtag #BlackLivesMatter. But the officials’ actions are doing little to assuage angry residents here. Rosa Mobley says she witnessed Mr. Gray’s arrest from her bedroom window, and heard him screaming as the police dragged him into a transport van. “We got this so-called black mayor, but she don’t care nothing about us,” Ms. Mobley said as Mr. Batts pulled up in the neighborhood in a black SUV just before noon on Tuesday. “They don’t come around here. Just because we’re poor, we don’t need to be treated like this.”

Because there are no national statistics on police-involved killings, it is impossible to say whether their numbers are increasing. But the growing prevalence of cellphone and police video, coupled with heightened scrutiny by the news media and the public after Ferguson, has focused intense attention on such cases, especially when officers are white and victims are black.

The police here did not release the racial breakdown of the six suspended officers. Now the Justice Department will look into whether they violated Mr. Gray’s civil rights. Such inquiries are not unusual; in Ferguson, the department did not find Mr. Brown’s rights were violated. However, a second broader Justice Department review of the Ferguson Police Department resulted in a scathing report detailing abusive and discriminatory practices by the city’s law enforcement system.

In Baltimore, police-community tensions date at least to 2005, when the Police Department, following a practice known as “zero-tolerance policing” made more than 100,000 arrests in a heavily African-American city of then roughly 640,000 people.

In 2006, the N.A.A.C.P. and the American Civil Liberties Union sued the city, alleging a broad pattern of abuse in which people were routinely arrested without probable cause. The city settled in 2010 for $870,000, agreed to retrain officers and publicly rejected “zero-tolerance policing.” Ms. Rawlings-Blake became mayor that year.

In 2012 she brought in Mr. Batts, who had run the police department in Oakland, Calif. In 2013, he proposed that police officers wear body cameras to capture encounters like the one that injured Mr. Gray; plans are now in the works for a pilot project.

Ms. Rawlings-Blake has also eliminated a police unit that had a reputation for treating suspects harshly. Last year, she and Mr. Batts asked the Justice Department to investigate after The Baltimore Sun reported that taxpayers had paid nearly $6 million since 2011 in judgments or settlements in 102 lawsuits alleging police misconduct. That investigation is ongoing.

William Murphy Jr., the lawyer for the Gray family, said Tuesday in an interview that “the commissioner’s heart is in the right place,” and that the mayor — whose father, Pete Rawlings, was a civil rights advocate and powerful Maryland politician — “understands police brutality and the extent to which it has a cancerous effect on our society.”

But Mr. Murphy said they had inherited “a dysfunctional department” whose officers “had no probable cause” to arrest Mr. Gray, who was stopped early on the morning of April 12 after a police lieutenant made eye contact with him and he ran away. That lieutenant was one of the six officers who were suspended.

“He was running while black,” Mr. Murphy said of Mr. Gray, “and that’s not a crime.”

At a news conference Monday, Deputy Police Commissioner Jerry Rodriguez said Mr. Gray “gave up without the use of force.” Mr. Gray, who was apparently asthmatic, then asked for his inhaler, but he did not have one; he was conscious and speaking when he was loaded into the van to be taken to the police station, Mr. Rodriguez said.

In interviews on Tuesday, witnesses gave various accounts. Michelle Gross, who took cellphone video of the arrest, said she saw two officers standing over Mr. Gray as people said: “He’s just lying there? Why don’t you call an ambulance? Why don’t you get him some help?”

Another witness, Kiona Mack, who said she took the cellphone video that showed Mr. Gray being dragged into the van, said she saw officers “sitting on his back, and having his leg twisted.”

Members of Mr. Gray’s family have said he suffered three fractured vertebrae in his neck and that his larynx was crushed, according to The Baltimore Sun; Mr. Murphy, the lawyer, said Mr. Gray’s spinal cord was 80 percent severed. Those details have not been confirmed by doctors or authorities, but experts on spinal cord injury said even less obvious neck trauma could be life-threatening.

“It doesn’t necessarily take huge force to fracture or dislocate a vertebra, and have a traumatic compression of the spinal cord,” said Ben A. Barres, professor of neurobiology at the Stanford School of Medicine. “It gets worse very rapidly if it’s not treated.” And, he said, “moving the person, like lifting him into a van, or even the ride in the van, could make the injury much worse.”

The police have said they will complete their inquiry by May 1 and turn it over to the state’s attorney in Baltimore — Maryland’s name for local prosecutors — who will determine whether to bring criminal charges. Ms. Rawlings-Blake has said she will also convene an independent commission.

In Mr. Gray’s neighborhood, which is adjacent to a public housing development called the Gilmor Homes, people remembered him Tuesday as a likable young man who sometimes got into trouble with the law — Maryland court records show he had at least two arrests for drug-related charges since December.

Mr. Gray had a twin sister, and a brother who died, friends say, and he also suffered lead poisoning as a child. They are furious about his death, and particularly about police conduct.

“He wasn’t out causing any trouble,” said Roosevelt McNeil, 26, who had known Mr. Gray since Mr. Gray was a child. “He had some arrests, but he wasn’t a big drug dealer or something like that. He was a great guy over all — he didn’t deserve to be handled like that. Why won’t the cops say how they ended up going after him, from that to him having his neck broken?”

Source: NY Times

SHERYL GAY STOLBERG and RON NIXON