Paul Macklin had appealed against his conviction for branding gun at police A former pupil at the Scots school Prince Charles attended failed to overturn his conviction for threatening police with a pistol during a chase. Ex-Gordonstoun pupil Paul Macklin, 40, was said to have put his privileged up-bringing behind him and turned to a life of crime because he was an "adrenalin junkie" who needed kicks. He first hit the headlines in 1994 when he and another ex-public schoolboy, Robert Cadiz, were convicted of planning a £300,000 armed raid in Aberdeen. In September 2003 Macklin was found guilty of possessing a handgun in the Printfield area of Aberdeen six months earlier and of repeatedly presenting the weapon at two police officers who were pursuing him. Macklin was jailed for 15 years - later reduced on appeal to ten years - but has been protesting his innocence ever since. In a long-running appeal he claimed he had suffered a miscarriage of justice because police did not hand over material which his defence team could have used at his trial to counter allegations that he was the gunman. Macklin's lawyers did not know police found fingerprints of another man in a black Ford Sierra in which the gunman had tried to flee. The fingerprints belonged to a criminal "known" to police who had a number of previous convictions. Police were also accused of failing to hand over statements casting doubt on other eye-witness claims that the man they saw was Macklin. At the Court of Criminal Appeal in Edinburgh, Lord Mackay of Drumadoon, sitting with Lord Hodge and Lord Wheatley, heard advocate depute Gillian Wade QC, for the Crown, that failure to disclose material could only overturn a conviction if there was a real chance it might have made the verdict go the other way. On Wednesday the judges ruled there had been no miscarriage of justice and Macklin - who had been on bail pending the outcome of the appeal - was sent back to prison to complete his sentence. The judges also rejected other grounds of appeal based on police witnesses pointing out Macklin in the dock when there had been no previous identification parade. The trial heard how police were called to an incident on May 11, 2003, where a man had been stabbed. As they pushed their way into a flat they heard "scuffling" suggesting people were escaping through a back window. Police rushed to the back green and saw a man they said was Macklin who refused to stop when challenged. The chase continued until Macklin dodged down a side street, out of sight and police heard the sound of a car driving away with squealing tyres. Macklin was later found to have checked into an Aberdeen hotel under a false name. The chase was seen by children playing in the area and by witnesses who told the trial Macklin was not the man they had seen but the jury preferred the evidence of the police.