A MAN was cleared in the High Court this week of a robbery committed more than five years ago. The prosecution case against transport worker Wan Kwok-foo, 26, rested on a single fingerprint found on a jewellery box left at the scene of the crime. Wan claimed he knew nothing about the robbery, in which a 75-year-old maid was tied up and blindfolded. He said that if it was his fingerprint, it must have got there innocently, perhaps when he touched it in a shop before it was bought. Wan was found not guilty of robbery by a jury on Monday. The robbery took place at the home of Choi Lai-ching on October 18, 1989. The maid, who was alone in the premises, was tricked into opening the door and four men rushed in. The robbers ransacked the flat. Valuables worth $103,550 were later found missing. Wan, who pleaded not guilty to robbery, was arrested in June 1993.