A PATIENT at a mental health unit has been handed a community order for the manslaughter of a man who died four years after he attacked him in a betting shop.Donovan Calder, 55, had a disagreement with fellow customer Eric Mills in Ladbrokes in High Street, Harlesden, at 4.20pm on January 26 2008 about one owing the other money.Mr Mills, of Wendover Road, Harlesden, was punched and collapsed to the floor and Calder repeatedly stamped on his head.The 46-year-old victim was treated at Central Middlesex Hospital in Park Royal, The National Hospital for Neurology and Neurosurgery in Russell Square, central London, and St Thomas' Hospital in Lambeth, south London, and after months of treatment he was placed into a care home as he required 24-hour care and assistance.Calder was arrested and charged and in July 2008 was found not guilty of attempted murder but guilty of causing grievous bodily harm with intent at the Old Bailey.That December the court granted a hospital order and a restriction order under the Mental Health Act 1983 and ordered Calder to be detained indefinitely at a mental health unit.On December 14 2009 Mr Mills was admitted to Hammersmith Hospital in East Acton, west London, suffering from pneumonia and died five days later.The pathologist who conducted the post-mortem examination recorded the cause of death as bronchopneumonia and severe head injury and concluded that there was a direct link between the assault and Mr Mills’ death.The Attorney General gave authority on August 1 2011 for Calder to be charged with murder and three days later he was arrested at a mental health unit in west London and charged.In May at the Old Bailey Calder pleaded guilty to the manslaughter of Mr Mills on the grounds of diminished responsibility and on Monday received a three year community order.