A crowded bus turned into a trap after a robber who used it as a getaway vehicle was caught inside when it was stopped by a policeman, a court heard yesterday. Sergeant Wu Chung-yee stopped the bus in the middle of King's Road, North Point, after seeing robber Chan Wai-kee, 35, board the vehicle, prosecutor Peter Sit said. After a search, Chan was found cowering on an upper-deck seat, the District Court was told. Judge Richard Hawkes jailed Chan, a property agent, for four years yesterday after he pleaded guilty to two robbery charges. The judge said a serious view had to be taken of robbery and he had given credit for Chan's guilty plea before passing sentence. In mitigation, lawyer James Burney said Chan was driven to crime because his estranged wife was heavily indebted to loansharks and he also needed money so his sick father could go to hospital. Mr Sit told the court Chan followed two elderly women into lifts on June 20 and November 13 last year and robbed them of gold ornaments. Chan escaped the first time but was stopped by Sergeant Wu shortly after the second robbery. Chan tried to run away but was chased by Sergeant Wu. He was then seen boarding the bus on King's Road in which he was later arrested.