A grand jury has accused a suspect in the Buffalo massacre, the prosecutor said

White man accused of killed 10 black people at a supermarket in Buffalo appeared in court on Thursday, standing in silence during a brief meeting attended by some relatives of the victims after a grand jury charged him.

18-year-old Peyton Hendron wore an orange prison uniform, mask and handcuffs. As he was being taken out, someone shouted, “Peyton, you’re a coward!” from the gallery of the courtroom. He is being held in the pre-trial detention center without a written undertaking not to leave.

Assistant District Attorney Gary Hackbush has been charged with first-degree murder covering all 10 deathswas transferred on Wednesday.

Thirteen people were shot dead Saturday at the Tops Friendly Market in the predominantly black Buffalo area. Authorities continue to investigate allegations of hate crimes and terrorism.

District Attorney John Flynn said his office would not comment on the case while the grand jury’s investigation continues.

Hendron’s lawyers were called to comment.

The family members of the victims, who were present at the hearing, left without talking to journalists.

The 18-year-old Hendron conducted a live broadcast of the attack from a helmet camera before surrendering to police near a grocery store. Shortly before the attack, he posted hundreds of pages of articles in online discussion groups detailing his plans for the attack and racist motivations.

Investigators are studying these documents, including a personal diary he kept on the Discord chat platform.

During his first appearance in court last week, Hendron’s lawyer was appointed by the court pleaded “innocent“on his behalf. He must return to court on June 9.

The massacre at the Tops supermarket has caused alarm even in a country that is almost numb from the mass shootings. All but two of the 13 people shot during the attack were black. Hendron’s online writings say he planned the attack after he became fascinated with the ideology of white supremacy he encountered online.

The diary said Hendron planned his attack secretly, without assistance, but Discord confirmed on Wednesday that an invitation to access his private writings had been sent to a small group of people about 30 minutes before the attack.

Some of them accepted the invitation. It was unclear how many people read what he wrote or logged in to watch the attack live. It was also unclear whether anyone was trying to warn law enforcement.

Buffalo Police Commissioner Joseph Gramaglia said investigators are working to obtain, verify and verify Hendron’s messages online.

New York Gov. Katie Hochul on Wednesday authorized Attorney General Leticia James to explore social networking platforms used by Gendron to determine whether they were responsible for “providing a platform for planning and promoting violence”.

Meanwhile, Dispatcher 911 was working placed on administrative leave After officials felt that her handling of a phone call from a store employee during the shooting was “completely unacceptable,” Erie County Executive Director Mark Palancarz told a news conference on Wednesday.

Latisha Rogers, an assistant office manager at Tops, said she called 911 and began whispering to the dispatcher. But she says the operator hung up and she had to call her boyfriend and tell him to call 911.