In May 1992, the two of them were seen entering a broom cupboard, and Parker's colleagues demanded she be transferred, first to Pentridge and then the secure wing of St Vincent's Hospital.
Using a small piece of explosive smuggled into the prison by Parker during a visit, Gibb and Butterley blew out part of a window and climbed down a string of knotted bedsheets to La Trobe Street below where a getaway car containing firearms and equipment was waiting.
After several crashes, the escapees stole a motorcycle on the Westgate Freeway and continued on to Southbank Boulevard where they were intercepted by a police divisional van and engaged in a shootout with two officers.
An Australia-wide alert was issued, as Gibb, Butterley and Parker picked up a previously stored Pajero four-wheel drive in Frankston and escaped into regional Victoria.
When she was released from Deer Park Metropolitan Women's Correctional Centre in September 1997, Gibb picked her up in a stretch limousine and they spent the night at the Crown Towers hotel.
[5] The story of Gibb's escape and time on the run with Parker was adapted into a TV movie One Way Ticket (with the subjects' names changed to "Mick Webb" and "Deborah Carter").