A CORRECTIONAL Services Department officer tore a six-year-old boy from his father's arms and threw him to the ground during the Whitehead raid in April, a court heard yesterday. The CSD officer, Cheung Foo-sang, also beat a Vietnamese boat person about the head and chest with a baton and kicked him, Sha Tin Court was told. Cheung, 35, has pleaded not guilty to three counts of common assault, charges arising from an investigation into the April 7 raid on the Whitehead detention centre. Prosecutor William Lam Kui-po told the court six-year-old Hoang Manh Dung, who is too young to give evidence, was left with red fingerprints on his throat after being assaulted. The incident allegedly happened as the boy was being carried by his father. The boy was regaining consciousness after having been tear-gassed, Mr Lam said. 'The defendant came along, grabbed the child by the throat and put him on the ground, threw him on the ground, with some force. 'Afterwards, the father noticed the son's throat became swollen . . . and had reddish fingerprints and so on,' Mr Lam said. The alleged victim in the other two assault counts, Nguyen Van Lim, yesterday identified Cheung as the officer who grabbed him by the collar and beat him. The offences allegedly occurred near the main gate of section 7 and inside a registry office. 'He used his baton to beat my chest, my head. He also kicked me,' Mr Nguyen told the court. 'Then I was brought to another place where I was beaten up fiercely.' Mr Nguyen will continue to give evidence this morning before Magistrate Timothy Jenkins. Proceedings got off to a slow start yesterday when defence counsel Paul Tse Tak-yan applied for a second adjournment in as many days, saying he had not been given enough time to prepare his case. Mr Tse accused the prosecution of withholding 17 statements provided by boat people and not supplying him with copies of 19 video tapes taken during the raid. Mr Lam rejected the accusations, saying he too had not been given the statements and that the videos were of no relevance to the case. Mr Jenkins refused to adjourn the trial until next week, because the loss of two days had already threatened to delay a second Whitehead case, involving two CSD officers also charged with assault, which is due to start next Monday.