Auckland University associate professor Chris Wilson and researcher Michal Dziwulski released He Told Us: How an Australian Committed Far-Right Terrorism in Christchurch New Zealand - on Monday.
Warning signs were missed ahead of the terror attacks in Christchurch on 15 March 2019, a new book says.
Fifty-one people were killed when Brenton Tarrant opened fire at the Al Noor Mosque in Riccarton and shortly afterwards at the Linwood Islamic Centre. Many more were left injured and grieving.
The terrorist was arrested on the day and later plead guilty to 51 counts of murder, 40 of attempted murder, and one of committing terrorism. He was jailed for life without the possibility of parole.
An attempt to appeal his conviction and sentence was dismissed.
