Javaid Ali murder trial: Accused 'joked' he did it 19 September 2013 Last updated at 14:22 The mother of a man accused of murdering Javaid Ali has told a court that her son joked that he was responsible for killing the shopkeeper. Margaret Anderson, 50, told the High Court in Glasgow that her son Lee, 31, told her: "It was me." But she said it was a joke as "a couple of minutes later he said 'I'm sorry mum I didn't mean to give you a fright'." Mr Anderson denies murdering 48-year-old Mr Ali at Sunshine Grocers in Green Road, Paisley, on 15 June 2012. Mrs Anderson, a mother-of-four, told prosecutor John Scullion that her son made the remarks while they were in the kitchen of her home in Foxbar, Paisley. She was asked if she thought her son had confessed to injuring Mr Ali and replied: "No. A couple of minutes later he said 'I'm sorry mum I didn't mean to give you a fright'. Mrs Anderson told the jury that when her son said "it was me" she was taking clothes out of her washing machine and couldn't see his face. Joke remark Mr Scullion asked: "Did you think he was joking," and she replied: "Yes." The prosecutor added: "When your son said those words your initial thought was he was confessing to injuring Javaid Ali," and she replied: "Yes." Earlier Mrs Anderson's partner, Allan McGauley, 50, told of hearing her suddenly say: "What" as she chatted to her son in the kitchen. Mr McGauley said in evidence: "Lee came into the living room. He said he had told his mum that he 'done the shopkeeper'. He said: 'It was me that done it.' When asked by defence QC Brian McConnachie why he had not gone to the police, Mr McGauley replied: "I really didn't think he was being serious. I didn't believe it. The court heard that in June 2012 Mr Anderson was a heroin addict. He denies all the charges against him.