The white supremacist responsible for killing 51 worshippers at two mosques in Christchurch in 2019 has launched an appeal against his conviction, arguing that the conditions of his detention left him incapable of making rational decisions when he pleaded guilty.
Brenton Tarrant, an Australian national and former gym instructor, carried out New Zealand’s deadliest mass shooting before admitting to the crimes in 2020. He was sentenced in August that year to life imprisonment without the possibility of parole — the most severe punishment ever handed down in the country.
According to a court summary, Tarrant claims that what he described as “torturous and inhumane” conditions during his trial impaired his mental state and decision-making ability. He is currently held in a high-security unit at Auckland Prison for inmates considered to pose an extreme risk, where he has minimal contact with other prisoners or people.
In statements cited by local media, Tarrant told the court that he lacked the mental clarity required to make informed legal choices at the time of his guilty plea. He said his state of mind had deteriorated to the extent that he contemplated making false claims about the attack, including attempting to implicate US President Donald Trump.
If the Court of Appeal in Wellington upholds his convictions, it will later hear a separate appeal against his sentence. Life imprisonment without parole remains the harshest sentence available under New Zealand law.
Tarrant carried out the attacks on March 15, 2019, using multiple semi-automatic weapons at two mosques in Christchurch. He had published an extremist manifesto online and livestreamed the killings for 17 minutes. The victims were all Muslim and included children, women and elderly worshippers.
Strict controls have been imposed on attendance at the appeal hearing, with only lawyers, court officials and media present in the courtroom. Families of those killed or injured have been offered the option to follow proceedings remotely from Christchurch via a delayed video feed, while members of the public can watch from a separate courtroom in Wellington under similar conditions.
For many families, the appeal has reopened painful wounds. Aya Al-Umari, whose brother Hussein was killed at the Linwood mosque, told The Press she believed the case had ended with Tarrant’s sentencing. “I was not prepared to go through this again,” she said.
The hearing is being conducted before a panel of three Court of Appeal judges. As is customary, a decision is likely to be reserved and delivered at a later date, making an immediate ruling unlikely.
The Christchurch attacks prompted sweeping gun law reforms under then prime minister Jacinda Ardern and renewed global pressure on social media companies to curb extremist content. Facebook later said it had removed 1.5 million videos within 24 hours of the attack in an effort to contain the spread of the livestreamed footage.
In 2021, Tarrant’s former lawyer said his client had believed pleading guilty was “the simplest way out” of the case, arguing the plea was entered under duress. The identities of Tarrant’s current legal team have been suppressed by court order.