New Zealand’s Court of Appeal has rejected an attempt by Christchurch mosque attacker Brenton Tarrant to overturn his conviction and sentence for the 2019 mass shooting that killed 51 people.
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Tarrant, a white supremacist, had pleaded guilty to carrying out New Zealand’s deadliest modern-day terror attack and was sentenced in August 2020 to life imprisonment without parole, the harshest sentence in the country’s legal history.
🔴🇦🇺 White supremacist who killed 51 people at two New Zealand mosques (in 2019) has lost his bid to overturn his convictions and sentence. pic.twitter.com/GPPUC2gtfg
— Clash Observer (@clashobserver) April 30, 2026
In his appeal, filed earlier this year, the 35-year-old argued that alleged “torturous and inhumane” prison conditions during his detention affected his mental state and prevented him from making informed decisions when he entered his guilty plea.
However, a panel of three judges dismissed his claims, stating there was no credible evidence supporting his arguments regarding his mental condition at the time of the plea.
The court noted that his statements were inconsistent and contradicted by prison authorities and mental health professionals who assessed him during the relevant period.
Judges further concluded that Tarrant’s guilty plea was made voluntarily and without coercion, adding that there was no indication he was pressured into pleading guilty.
The ruling described his appeal as having no legal basis, stating that the facts of the case were undisputed and that he had not presented any arguable defence.
The March 15, 2019 attacks targeted two mosques in Christchurch during Friday prayers. Armed with semi-automatic weapons, Tarrant opened fire on worshippers, including men, women, and children. He also livestreamed the attack online and had previously published an extremist manifesto.
The court proceedings were briefly complicated after Tarrant attempted to withdraw his appeal and later submitted additional documents using pseudonyms. However, procedural issues led to those filings being rejected.
Families of victims and survivors welcomed the court’s decision, describing it as a relief that would prevent further emotional trauma associated with reopening the case.
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Legal representatives said the ruling ensures that survivors and families will not be forced to relive the events of March 15 through a new trial process. The decision effectively confirms Tarrant’s original conviction and life sentence, bringing the appeal process to an end.