David Auchterlonie's family disgusted at halving of his killers' sentences Mathew Milat being led into his sentencing hearing at the King St court complex. DAVID AUCHTERLONIE'S killers never relented or showed any empathy as he was tormented and bludgeoned with a double-bladed axe by the great-nephew of backpacker serial killer Ivan Milat, today David's family said they were disgusted the pair convicted of his murder want their sentences halved. Lawyers for Mathew Milat, sentenced to 43 years with a non-parole period of 30, and Cohen Klein, sentenced to 32 years with a non-parole of 22, argued in the NSW Supreme Court Criminal Court of Appeal the brutal slaying in Belanglo State Forest didn't fit the worst category of murder. Milat, 17 at the time, and Klein, 18, lured David on his 17th birthday in November, 2010, into the infamous forest to celebrate by drinking alcohol and smoking cannabis. But when they got there Milat took Auchterlonie to the back of the car where he hit him four times with the axe, the last time fatally in the head, over an eight-minute period, which was recorded by Klein on a mobile phone. Donna Lock, David Auchterlonie's mother, outside the Supreme court today is disgusted and outraged. Outside the court David's mother Donna Lock, 38, said her son's killers should never be freed. "I am disgusted and outraged and hurt how ridiculous and wrong it is to think we are back here today and we should not be back for them to appeal when David wasn't given a chance to appeal his death sentence," she said. He would have been so terrified. You can only horrifyingly imagine, so far away home, no one to hear help or save him. I feel so helpless I wasn't their to help my son. David was and always will be a loving, caring and amazing young man. They aren't sorry or (have) shown any remorse for what they have done they are only sorry they got caught and are locked up. Sandra Auchterlonie at David's funeral. Justice Robert Hulme said nine months after the killing Milat wrote poems in letters to his family from prison that showed "unrepentant enjoyment of callous murder." One titled "Killer looks and on evil side" had the verse "shelter you will need to seek, so terrified you can hardly speak," while another poem included "I am not fazed by blood or screams, nothing I do will haunt my dreams." The court also heard Milat bragged to one witness after the killing that he had "done what his family is known for" and made reference to being "the first one to 10 (murders) " in relation to his infamous great-uncle. Cohen Klein. David's father David Auchterlonie said outside court while Klein didn't actually kill his son he helped plan, record and cover up the murder. I don't think Klein should get any discount he didn't give David any, neither of them did. I don't see why they should appeal it. David copped the ultimate sentence," he said. David's grandmother Sandra Auchterloine, who was caring for him when he was killed, said the sentences should remain unchanged and dismissed the argument of mitigation by Klein's lawyer Janet Manuell that his mother would support him through his lengthy sentence. I suppose a mother's a mother but he did the crime he should do the crime. If he was my son I'd disown him. They both should have got life," she said. The three judge panel reserved their judgment.