Rampage killer who murdered Michaela Dunn faces punishment The man who terrorised Sydney CBD and murdered a young woman by stabbing her dozens of times has been jailed for his horrific crimes. Crime by Heath Parkes-Hupton 14th May 2021 2:24 PM A man who brutally murdered a defenceless woman before running bloodied and armed through the streets of Sydney's CBD has been jailed for at least 33 years. Mert Ney was on Friday sentenced to a maximum of 44 years and a non-parole period of 33 years for the terrifying rampage on August 13, 2019, which began in a Clarence Street unit and brought the city to a standstill.