The Christchurch mosque shooter pleaded guilty to all charges leveled against him.

Brenton Tarrant, who killed 51 people in a mosque last year in an act of terrorism, pleaded guilty to 51 counts of murder, 40 counts of attempted murder, and one charge of terrorism Wednesday.

The 29 year-old white nationalist will be held in custody until his sentencing, which is currently to be determined amid the coronavirus pandemic. He reportedly displayed no emotional reaction in the courtroom.

On March 15, 2019, a heavily armed Tarrant entered a mosque in New Zealand during prayers. Over the course of a few minutes, he opened fire on worshipers, killing 42 people.

He then exited the mosque to begin shooting at others outside, killing an additional seven people. Another victim died shortly after being shot in the hospital. The 51st victim died 48 days after the attack.

"While the sentencing hearing is still pending, today's guilty pleas are a significant milestone in respect of one of our darkest days," said Mike Bush, a New Zealand police commissioner.

"I want to acknowledge the victims, their families, and the community of Christchurch, the many lives that were changed forever. They have inspired all of us to be a kind and more tolerant community."

Bush later added that the gunman's sentencing was "New Zealand’s largest-ever criminal prosecution."