A schizophrenic man who held a jewellery shop manager at knifepoint said he did not intend to rob the store but only wanted to be arrested by police, a court heard yesterday. District Court Judge Peter Line acquitted Ku Tak-ming, 46, of attempted robbery, to which he pleaded not guilty, but convicted him of an alternative charge of common assault. Judge Line said although medical reports showed Ku was schizophrenic, he was not sure if the accused was under the influence of his illness at the time of the offence. 'But the prosecution is not in a position to exclude that possibility,' the judge said. He accepted Ku did not intend to permanently deprive the shop of the jewellery, even though he had told an assistant to put items into a paper bag. According to a medical report, Ku said he had only wanted to be arrested, not to commit robbery. No explanation was given. Prosecutor Bernard Chung Wai-ming said that on June 24 last year, Ku walked into Chow Sang Sang Jewellery in Tseung Kwan O and approached assistant manager Fung Ka-chuen. Ku pointed a 33cm knife at Mr Fung's waist. He then gave a paper bag to shop assistant Lai Chi-yuen and told him to fill it with jewellery, Mr Chung said. But Mr Lai sounded an alarm, and within minutes the police arrived and Ku surrendered. Sentencing was adjourned until January 23. Ku was remanded to Siu Lam psychiatric centre.