Mert Ney, the man who fatally stabbed sex worker Michaela Dunn during a knife rampage through Sydney's central business district, is reportedly facing new allegations of assaulting fellow inmates while held in Australia's most secure prison. Ney became notorious after his 2019 attack, which ended when members of the public bravely restrained him using a milk crate and chairs until police arrived, an act of intervention that drew widespread attention at the time.

The original rampage saw Ney kill Ms Dunn and wound another woman before being subdued, and he was later found not guilty of murder by reason of mental illness and detained indefinitely. He is now believed to be held within a high-security facility, understood to be Goulburn's "Supermax" unit, where he is accused of further violent incidents involving other prisoners, though full details of the latest allegations were not available in the source material.