Australian Brenton Tarrant who killed 51 Muslim worshippers at mosques in Christchurch,New Zealand in March 2019, has filed an appeal against his life sentence.br br Tarrant was sentenced in 2020 to jail for life without parole for the murder of 51 people and attempted murder of 40 others at two mosques in Christchurch, described as the worst mass shooting in New Zealand's history.