The Age | $1m up for grabs after Dupas appeal fails The Age Christina Halvagis, mother of Mersina Halvagis who was murdered by Peter Norris Dupas. Photo: Michael Clayton-Jones. THE key witness whose testimony helped convict serial killer Peter Norris Dupas over the 1997 murder of Mersina Halvagis is among ... Vicious serial Peter Dupas is the beast who roamed free to rape and kill It is the end: killer Dupas loses appeal Serial killer Dupas loses appeal |