 After six appeals his conviction was finally overturned in 2005.Darryl Beamish, a deaf mute man, was aged 18 in 1959 when the 22-year-old socialite and MacRobertson's chocolate heiress, Jillian MacPherson Brewer, was slain in her Cottesloe flat by an intruder who mutilated her body with a tomahawk and a pair of dressmaking scissors.According to Perth Detective Owen Leitch, 18-year-old Beamish provided four confessions, two through a sign language interpreter, one a written statement and another in notes scrawled on the exercise yard at the Perth lock-up.