A South Carolina prosecutor will seek the death penalty for Dylann Roof, who is charged with the murders of nine black worshippers at a Charleston church. (Reuters)

Prosecutors in South Carolina will seek a death sentence for Dylann Roof, the man accused of killing nine black parishioners in a Charleston, S.C., church earlier this year.

Roof has been charged with nine counts of murder and three counts of attempted murder for the June massacre inside the historic Emanuel AME Church.

“This was the ultimate crime, and justice from our state calls for the ultimate punishment,” Scarlett A. Wilson, the prosecutor for Charleston County, said during a news conference Thursday. Earlier in the day, court documents were filed showing that the state intended to seek the death penalty for Roof.

Roof knew he was creating a risk to more than one person, Wilson wrote in her filing, an aggravating factor under South Carolina state law. Prosecutors in the state can seek a death sentence if there are certain factors in a case, including if someone is charged with murdering more than one person during a single act.

In another filing, Wilson wrote that prosecutors would present evidence about Roof’s prior criminal actions and “propensity for violence and unlawful conduct.” She also wrote that prosecutors would show Roof’s “utter disregard and lack of remorse” for the killings.

[“Why is he doing this?” Survivors recount the shooting]

South Carolina Gov. Nikki Haley (R) had said Roof should face the death penalty after the June 17 shooting spree. Wilson said after the shooting that she would have conversations with the victims’ families before making a decision about the death penalty, saying that they “deserve to be involved in any conversations regarding the death penalty.”

On Thursday, Wilson described having many meetings with survivors of the shootings as well as relatives of the victims, saying that she was “blessed to be in the presence of such wonderful people.”

At Roof’s first court appearance two days after the shooting, relatives of the victims addressed Roof directly, telling him they forgave him and were praying for his soul.

“We all agree that forgiveness can be an important part of the healing process, but know that forgiveness does not necessarily mean foregoing consequences, even severe consequences,” Wilson said Thursday.

In South Carolina, inmates on death row can choose between lethal injection and electrocution.

Roof has also been indicted on federal hate crime charges alleging that he attacked the parishioners inside the “Mother Emanuel” church specifically due to their race and the church’s larger renown. In addition, the federal indictment states that he attacked people who were exercising their religious beliefs.

[Remembering the Charleston church shooting victims]

Days after the massacre, authorities confirmed that Roof had posted a racist manifesto on his Web site, filled with racial stereotypes and diatribes against black, Jewish and Hispanic people. In one part of the rant, Roof criticized people who only talked online and declared his desire to take action.

“We have no skinheads, no real KKK, no one doing anything but talking on the internet,” he wrote. “Well someone has to have the bravery to take it to the real world, and I guess that has to be me.”

The site was also filled with photos of Roof holding a .45-caliber Glock pistol and a Confederate flag. One official said it was last modified just hours before the shooting took place.

The federal charges also carry a possible death sentence, though Attorney General Loretta E. Lynch said in July that the federal government would conduct a review of the issues involved before deciding if it will seek such a punishment. No determination has been announced.

An attorney said in July that Roof intends to plead guilty to the federal hate crime charges, but he could not advise him until federal officials made a decision on the death penalty. As a result, the magistrate in that case entered a not guilty plea for Roof.

In death penalty cases, pleas of guilty or not guilty can be used as a way to sidestep a death sentence. Theodore J. Kaczynski, better known as the Unabomber, struck a deal and pleaded guilty the day that opening arguments in his trial were set to begin, agreeing to life in prison without possibility of parole and dodging the death penalty.

When Lynch announced the federal charges, she did not say how they would affect the state’s case, only describing them as a “parallel” prosecutions.

This story has been updated and will be updated again. First published: 1:35 p.m.

Related:

“I forgive you.” Relatives of Charleston church shooting victims address Dylann Roof

Survivors of the Charleston church shooting grapple with their grief

Dylann Roof’s eerie tour of American slavery at its beginning, middle and end

“Mother Emanuel” reopened with prayer, songs and tears