Following his murder the Winchester Police Centre, Benjamin Way, Belconnen, was established as the ACT Policing Headquarters. The Complex houses ACT Policing's Executive, administrative and support sections and elements of the Territory Investigations Group (TIG).
In 1995 David Harold Eastman was tried and convicted of the murder of Winchester and was sentenced to life imprisonment without parole. Eastman, born in 1945, is a former public servant from Canberra, Australia. During the 85 day trial, Eastman repeatedly sacked his legal team and eventually chose to represent himself. Eastman also abused the judge during his trial, and during later legal proceedings and appeals. Subsequent to his conviction, Eastman continuously appealed his conviction, attempting to win a retrial on the basis that he was mentally unfit during his original trial. On 27 May 2009, Eastman was transferred from a New South Wales prison to the ACT's Alexander Maconochie Centre to see out his sentence.
A new inquiry relating to his conviction was announced in August 2012. In 2014, the inquiry, headed by Justice Brian Ross Martin, found there had been "a substantial miscarriage of justice", Eastman "did not receive a fair trial", the forensic evidence on which the conviction was based was "deeply flawed" and recommended the conviction be quashed. Because a retrial would be neither feasible nor fair Eastman should be pardoned. However Martin said he was "fairly certain" Eastman was guilty but "a nagging doubt remains".