The perpetrator was identified as
Ahamed Aathill Mohamed Samsudeen (1988/1989 – 3 September 2021) a 32-year-old Samsudeen, who had a long history of mental health problems and sympathy towards the
Islamic State, was shot and killed by the police during the attack. Samsudeen was born in
Kattankudy,
Sri Lanka, a
Muslim-majority town which has had issues with
radicalisation in recent years. The youngest child in a family of four children, he received his secondary education at
Colombo Hindu College which in
Bambalapitiya,
Colombo before arriving in New Zealand in 2011 on a student visa. Samsudeen sought refugee status as a
Tamil Muslim, alleging that he and his father had issues with Sri Lankan authorities because of their political background. His original claim to refugee status was declined in 2012. In 2013 the
Immigration and Protection Tribunal said that Samsudeen was "persistently re-experiencing traumatic events" and concluded he had a well-founded fear of facing harm if he returned to Sri Lanka. He was subsequently granted refugee status. He apologised and deleted his social media account. Samsudeen continued to engage in online activities. On 19 May 2017, Samsudeen booked flights for his family to Kuala Lumpur, and for himself to Singapore via Kuala Lumpur. All were for the next day. Police arrested Samsudeen at
Auckland Airport on the evening of 20 May, After his arrest, police executed a search warrant at Samsudeen's flat. The search found Samsudeen had a large hunting knife under a mattress on the floor, and digital storage media which contained fundamentalist material, including propaganda videos, and photographs of Samsudeen posing with a firearm and digital bookmarks to sales of firearms, crossbows, binoculars, military boots and a vest. In August 2018, Samsudeen bought a knife while on bail After spending three years in prison, he was released into the community in July 2021. In May 2021, he had been convicted of possessing propaganda-style material supportive of ISIS and was sentenced to one year of supervision. After release from prison, he was being watched by police and the
New Zealand Security Intelligence Service, with up to 30 police monitoring him. At the time of the attack he was still facing charges for assaulting prison officers while in custody. In July 2020, Samsudeen remained in custody awaiting trial, and the Crown attempted to add an additional charge for the knife and internet posts under the current
Terrorism Suppression Act. The High Court denied this, stating that they were bound by law, Justice Downs said it was not for the courts to create such an offence, further saying "The absence of an offence of planning or preparing a terrorist act ... could be an Achilles' heel." In May 2021, Samsudeen was found guilty in the High Court of possessing undesirable publications, knowing and neglecting to help the police in carrying out their search warrants. He was found not guilty of another charge of having unpleasant material in his possession, as well as the accusation of having a weapon in a public place. On 6 July 2021, On 16 July 2021, Samsudeen was released on bail by an Auckland District Court judge and was to be monitored by the
Special Tactics Group. == Responses ==