A security guard yesterday won an 11-year battle for compensation from a mother and son whose violent attack he says changed him into a social pariah. Lo Siu-wing suffered a mental breakdown after the pair knocked him down and kicked him in a brawl at the car park where he worked. The Court of First Instance yesterday ordered his attackers to pay $101,853 compensation. Mr Lo, 49, claimed the trauma of the attack triggered a relapse of schizophrenia, changing him from a quiet, likable man into a social outcast. 'This is a man with paranoid delusions, in fear of others harming him and therefore particularly vulnerable if he were to be subjected to violence,' Mr Justice Conrad Seagroatt said. On May 25, 1987, Mr Lo was on duty in the car park at the United Centre, Admiralty, when Lee Wai-chuen and his mother Ng Yuk-kam parked their vehicle near the entry, obstructing it. Mr Lo ordered Mr Lee to move the car. When the pair ignored him, the guard stood in front of their vehicle. 'Lo used some strong and possibly vulgar language in remonstrating with Lee and Ng,' Mr Justice Seagroatt said in a written judgment. 'However, I am satisfied that the guard committed no aggressive act.' Mother and son were said to have pounced on Mr Lo, with Mr Lee then kicking him repeatedly. All three appeared before a Western magistrate in July 1987, charged with fighting in a public place. Mr Lee pleaded guilty. His mother denied the charge but was convicted and fined. Mr Lo's charge was dismissed.