early 2016 it was classified as a restricted regime unit, a stepping stone for prisoners transitioning out of high security units into mainstream units. In late 2016 it was again reclassified as a youth justice centre, to house 16 and 17 year olds after the loss of half of the Melbourne Youth Justice Precinct at Parkville. Illawarrawas initially a mainstream unit for prisoners classified as Medium Security. Since 2016 has been used as a remand unit, housing prisoners yet to be convicted or sentenced, and as such offering more incentives such as longer let out hours and facilities. This unit is also a demountable building that has remained permanent and has the ability to be separated from the mainstream units because it is internally fenced and gated. Melaleucaa high security unit that is used to accommodate high risk prisoners. This unit was opened in 2007 and can accommodate 24 prisoners in single cells, separated into 4 different areas. Oleariathe newest High Security unit at the prison, officially opened on 10 August 2016 and accepting prisoners from 22 August 2016. The 36 million dollar expansion is officially a prison within a prison, separated from the rest of Barwon and housing its own visits centre and medical wing. The maximum security unit can hold up to 40 prisoners in single cells, including 20 that have their own small exercise yards for prisoners who cannot mix with others. Incidents In April 2010, convicted Melbourne gangland murderer and drug dealer Carl Williams was bashed to death inside the Acacia Unit by fellow prisoner Matthew Johnson. A 2012 art exhibition called The Barwon Interviews, comprising video footage of twelve inmates, was part of a Monash University PhD project that was focused on examining prisoners adjusting to life inside Barwon Prison, their family struggles, and guilty consciences. In February 2012, visiting Barwon Prison to speak to Indigenous inmates as part of a mentoring program, former AFL player Wayne Carey was found to have traces of cocaine on his clothing following a routine drug scan. Carey was informed that he could enter the prison if he submitted to a strip search. He declined and left the correctional facility. In November 2014 a prisoner strapped a homemade explosive device to his body. The device was made partly from ground up matchheads and triggered a lockdown in the facility. Victoria Police specialist teams including the Critical Incident Response Team