Gregory John 'Bluey' Brazel (born 17 November 1954) is a convicted Australian serial killer, arsonist, and armed robber currently serving three consecutive life sentences for the murders of sex workers Sharon Taylor and Roslyn Hayward in 1990, and the murder of Mordialloc hardware store owner Mildred Hanmer during an armed robbery in 1982 to which he confessed some eighteen years later.
Brazel is often described as one of the most manipulative and violent prisoners in Victoria's prison system, and was estimated to be worth more than A$500,000 in 2000.