: 139 In 1989, David McMahon, a victim who had escaped being thrown from the cliffs, identified Sean Cushman and another person as two members of the group. : 138 They are primarily associated with deaths at Marks Park, and also referred to themselves with the abbreviations PTK and PSK, generally understood to mean 'People that Kill' and 'Park Side Killers' respectively. The Bondi Boys were the largest and most prolific of the groups, constituted of 30 men and women aged between 12 and 18. : 32 Though he met resistance from within the force, investigating officer Steve McCann followed up this evidence, eventually learning of the 'Bondi Boys'.
In a recording taken of the group in the prison, they also bragged of murdering a gay man at the Marks Park cliffs (described as 'cliff jumping'). In 1991, the 'Alexandria Eight' were convicted for the murder of Richard Johnson the previous year in a bathroom at Alexandria Park.
