Sarah Cafferkey's killer Steven James Hunter has appealed against his life sentence Steven James Hunter in custody outside court. Sarah Cafferkey died at the hands of Hunter after an argument in which he "snapped." EVIL killer Steven James Hunter is appealing his sentence of life without parole for the murder of 22-year-old Bacchus Marsh woman Sarah Cafferkey. Hunter's lawyers lodged papers in the Supreme Court on Wednesday. The 48-year-old killer, who has a criminal career spanning 30 years, was sentenced to life without parole last month over the November, 2012 murder. Ms Cafferkey's mother Noelle Dickson said today she was angry about his appeal. "My initial reaction was I was sick to the stomach," Ms Dickson said. I started crying, then I got angry and now I'm just about exhausted. I understand about this natural justice and stuff but he's a double murderer. He has had no regard for the law his entire life. Victorian Legal Aid represented Hunter in his Supreme Court plea. Ms Dickson said it would be outrageous if taxpayers were expected to foot the bill for Hunter's appeal. Hunter, of Bacchus Marsh, attacked Ms Cafferkey with a hammer and stabbed her 17 times in a murder that Justice Kevin Bell described as callous, calculating, brutal, and "shocking in its ferocity, especially given that Sarah was entirely defenceless." Hunter then dumped her body in a bin. He told police he "snapped" during an argument after she became angry when she mistakenly thought he called her a "junkie." Hunter, who once escaped from Pentridge Prison, had completed a parole period less than two weeks before murdering Ms Cafferkey. A double killer, Hunter has already served 13 years for the 1986 stabbing murder of Moonee Ponds woman Jacqueline Mathews. Hunter pleaded guilty to Ms Cafferkey's murder. Forensic psychologist Professor James Ogloff told the court it was ``patently obvious" Hunter would remain a significant risk to the public.