Brenton Tarrant, the Australian white supremacist responsible for the deadliest mass shooting in New Zealand's history, is seeking to overturn his guilty plea for the 2019 Christchurch mosque attacks. Tarrant, who admitted to killing 51 Muslim worshippers and attempting to murder 40 others, is arguing that his plea was made under duress due to "torturous and inhumane" prison conditions that impaired his mental health.

Tarrant, 35, was sentenced to life imprisonment without the possibility of parole in August 2020, becoming the first individual in New Zealand to receive such a sentence under current laws. However, in 2022, he filed an appeal to withdraw his guilty plea and contest his sentence, claiming that solitary confinement and limited access to reading materials contributed to his mental deterioration.

The week-long hearing at New Zealand's Court of Appeal in Wellington is examining whether Tarrant's mental state at the time of his plea was compromised. Appearing via video link, Tarrant stated that he experienced "nervous exhaustion" and felt compelled to plead guilty due to his prison conditions. Crown lawyer Barnaby Hawes challenged this assertion, suggesting that Tarrant had other legal options available, such as delaying his trial on mental health grounds.

Victims' families, including Aya al-Umari, whose brother Hussein was killed in the attack, are following the proceedings through a delayed broadcast. Al-Umari expressed her determination not to let Tarrant's appeal reopen old wounds, stating, "He just wants his limelight and to be relevant again."

Security measures have been heightened for the hearing, with limited public access and provisions for victims to view the proceedings remotely. The court's decision on whether Tarrant can withdraw his plea will be announced at a later date. Should the plea be vacated, the case will return to the high court for a potential trial on all charges. If not, a separate hearing will address his sentence appeal later this year.