A top customs officer is believed to have killed himself last night, hours after being arrested by the ICAC for leaking information about copyright investigations. Simon Wong Shiu-ming, a senior superintendent from the department's administration and excise branch, was one of six people arrested by the Independent Commission Against Corruption in relation to the case, police and ICAC sources said. Released on ICAC bail, he was found lying unconscious on the pavement in Kwai Fuk Road, Kwai Chung, underneath a car park shortly before 8pm. He was taken to Princess Margaret Hospital, where he was declared dead. No identity documents were found on the body. But officers searched the Kwai Fuk Road building and found Wong's car keys and a parking ticket on the seventh floor of the car park. His car was found later in another car park in Tsing King Road, Tsing Yi. Commissioner of Customs and Excise Timothy Tong Hin-ming last night expressed 'deep regret' over the sudden death of Wong, and offered condolences and assistance to Wong's family. Mr Tong said he would not comment on the cause of death as the case was under police investigation. Also arrested were the chairman and a director of a private detective agency as well as a senior executive and two employees of the International Federation of the Phonographic Industry. The ICAC accused the senior superintendent of taking bribes from the detective agency in return for supplying it with information about customs investigations into music copyright infringements. He was also said to have been paid for referring businesses to the detective company, which specialised in dealing with music copyright infringements. It is understood the detective agency would use the information to approach music companies and offer them its services in seeking compensation from copyright violators in civil lawsuits. The anti-corruption body said it believed the senior superintendent had accepted unauthorised loans of about $200,000 from the arrested music association executive. Initial investigations suggested the loans were not related to bribery, but were nonetheless illegal. The officer was also said to have cheated the government by making false reimbursement claims on holiday expenses under the government's Long and Meritorious Service Travel Award Scheme.