SACRAMENTO, Calif. — California’s capital city is on edge for the funeral of a 22-year-old unarmed black man killed by Sacramento police in his grandparents’ backyard.

The Rev. Al Sharpton plans to give the eulogy for Stephon Clark at Thursday’s funeral at Bayside of South Sacramento church.

He previously called it “an atrocity” that shows the urgent need for intervention against police misconduct and a thorough investigation into Clark’s death.

Some mourners at Wednesday’s wake for Clark predicted increased unrest beyond the unruly but mostly nonviolent protests that have disrupted traffic and two professional basketball games since the March 18 shooting.

The Rev. Ray Morsheth of Sacramento Revival Center said he plans to stay away from the funeral for fear things could turn ugly, while the Rev. Phillip Goudeaux of Calvary Christian Center said it should be a time for peace and forgiveness.

READ MORE: Stephon Clark and what we still don’t know about the Sacramento police shooting

“I am very concerned about the climate and what’s going on right now,” Goudeaux said of the high emotions since Clark’s death.

Two Sacramento police officers who were responding to a report of someone breaking car windows fatally shot Clark in his grandparents’ backyard. Police say they thought he was holding a gun, but he was found only with a cellphone.

Some mourners attending Wednesday’s wake called for police to face criminal charges or donned black shirts calling for justice.

The family’s raw grief was on display when Clark’s brother, Stevante Clark, had to be physically restrained while confronting members of the media gathered outside the wake. The outburst came a day after he disrupted a Sacramento City Council meeting and chanted his brother’s name at Mayor Darrell Steinberg.

“What we want the world to know is that we got to stop this because black lives matter.”

Some of Clark’s relatives were more conciliatory.

“We’re not mad at all the law enforcement. We’re not trying to start a riot,” said Shernita Crosby, Stephon Clark’s aunt. “What we want the world to know is that we got to stop this because black lives matter.”

Cousin Suzette Clark said the family wants Stephon Clark remembered as an outgoing, funny, handsome, loving father of two young sons, as “more than just a hashtag.”

“I just hope it can bring people together,” she said of the two-hour funeral set to begin at 11 a.m. “Emotions are heightened, but I just hope everyone comes and shows compassion.”

Authorities are working to avoid a repeat of the protests that have twice blocked fans from entering the NBA arena downtown for Sacramento Kings games. The police, the Kings and Steinberg’s office met Wednesday to discuss security ahead of Thursday night’s game. Sgt. Vince Chandler said officers would be ready to respond in protective gear, according to The Sacramento Bee.

Stephon Clark’s funeral “will be a national day of mourning for this family and for Stephon Clark. But it will also be a national day of justice.”

On Wednesday, about 50 protesters took over the intersection near the Sacramento district attorney’s office as part of a protest organized by the local Black Lives Matter chapter to urge the district attorney to file charges against the officers who shot Clark. In New York City, hundreds of people marched to protest the shooting and at least 11 people were detained as tensions flared.

Meanwhile, Steinberg said disruptions like Stevante Clark’s at Tuesday’s council meeting won’t happen again. “But in that moment, that was a brother grieving for the loss of his brother,” he said.

The California attorney general’s office on Tuesday joined the investigation, a move Sacramento Police Chief Daniel Hahn said he hopes will bring “faith and transparency” to a case that he said has sparked “extremely high emotions, anger and hurt in our city.”

The Rev. Shane Harris of the National Action Network, a civil rights group founded by Sharpton, said this week that Clark’s funeral “will be a national day of mourning for this family and for Stephon Clark. But it will also be a national day of justice.”