THE father of a computer enthusiast accused of launching hacking raids on educational establishments is a senior physics lecturer at a Hong Kong university, it was revealed at Eastern Court yesterday. Chen Shu-chi, 56, who works at the Baptist University, Kowloon, told the court he remembered his son playing with friends on a computer at the family home. But he had no idea what they were playing, he added. Mr Chen, giving evidence for the prosecution, said he had brought a computer home from the university where he worked. He was asked by prosecutor Kestutis Kripas about a program which the prosecution say was used by his son to hack into the commercial Supernet system and computers at two universities. Mr Chen said he could not remember how this 'cracker' program came into being. He told the court his students had had access to the computer, which was in his research laboratory for more than three months before it was delivered back to his home. 'My students and research students helped me to install some software into the computer and sometimes I asked them to fix it for me,' he said. His son, Ray Chen, 25, has pleaded not guilty to a charge of obtaining unauthorised access to computer data on August 31, September 27 and October 8 last year. He was allegedly using a program called 'Procomm Plus for Windows', to gain access to the computers of Hong Kong University of Science and Technology, Hong Kong Polytechnic University and Supernet from his Taikoo Shing flat. The court heard that Commercial Crime Bureau officers posed as neighbours concerned about a water leak to gain access to Mr Chen's home and seize the computer equipment. The trial before Magistrate Alan Wright continues today.