The gunman had intended to burn down the mosques afterward, a prosecutor said in court Monday.

New details about the March 2019 attacks were outlined during the first day of a four-day sentencing hearing at the Christchurch High Court.

The hearing gave some families and survivors their first chance to confront the gunman.

Read Also: Christchurch marks anniversary of mosque shootings

“You killed your own humanity, and I don’t think the world will forgive you for your horrible crime,” said a tearful Maysoon Salama, the mother of 33-year-old Atta Elayyan, who was killed in the attacks.

“You thought you can break us. You failed miserably.”

The gunman, 29-year-old Australian Brenton Harrison Tarrant, pleaded guilty in March to 51 counts of murder, 40 counts of attempted murder and one count of terrorism — the first terrorism conviction in New Zealand’s history.

He could become the first person in New Zealand to be sentenced to life imprisonment without the possibility of parole.

Tarrant was brought into the courtroom shackled and wearing a gray prison outfit.

 In the dock, unshackled and surrounded by five officers, he showed little emotion throughout the hearing. He occasionally looked around the room, tapped his fingers, and watched the survivors as they spoke.

Read Also: Christchurch mosque attacks suspect pleads not guilty to all 92 charges

The courtroom was only half full due to coronavirus distancing requirements, while many others watched from adjacent courtrooms where the hearing was streamed. Survivors and family members occasionally wept and comforted each other.

The hearing began with prosecutors outlining the attacks in a 26-page summary of facts, the first detailed account by authorities about what happened that day.

Crown prosecutor Barnaby Hawes said that two months before the attacks, Tarrant flew a drone directly over the Al Noor mosque, recording an aerial view of the grounds and buildings and taking note of the entry and exit doors.

Hawes said the gunman planned his attacks for when the maximum number of worshippers were present, and that 190 people were in the Al Noor mosque for Friday prayers on the day of the attacks.

In his car, the gunman had six guns — two AR-15 rifles, two other rifles, and two shotguns, the court heard. He also brought with him four modified gas containers which he planned to use to burn down the mosques after he finished shooting, Hawes said. The gunman later told police he wished he had used them.

Hawes also detailed the bravery of Naeem Rashid, who was killed at the Al Noor mosque.

At the second mosque, Abdul Aziz chased Tarrant down the driveway screaming at him, prosecutors said, and threw a discarded rifle at his car, shattering a glass panel. Aziz was not injured.

Tarrant has dismissed his lawyers and is representing himself during the sentencing, raising fears he could try to use the occasion as a platform to promote his racist views. He can choose to speak once the survivors have spoken, although the judge will likely shut down any attempts he makes to grandstand.

New Zealand abolished the death penalty for murder in 1961, and the longest sentence imposed since then has been life imprisonment with a minimum 30-year non-parole period. Justice Cameron Mander will decide on the gunman's sentence at the end of the hearing.