A THAI businessman shouted that he was innocent and banged his head against the railing of the dock when he was sentenced to five years' jail for raping a friend's maid. Tangkao Sae-tang, 31, vowed that he would appeal against his conviction after a jury rejected his claim that the domestic worker consented to sex, and found him guilty. He had pleaded not guilty to raping the 25-year-old woman, claiming that she took the initiative. Passing sentence, Mr Justice Leong said Tangkao had used force on the maid and had put her through the trauma of having to have sex with him against her will. He noted that Tangkao had to look after a 64-year-old mother and a young son now five, but he ought to have considered their welfare before he embarked on this criminal act. Fortunately, the judge said, the maid was not seriously injured. He accepted that there was no other aggravating feature in the case. During the trial, the court heard evidence called by Senior Assistant Crown Prosecutor Arthur Luk that Tangkao was the sole proprietor of a trading company in Thailand and he visited Hong Kong from time to time. During a visit last February, he stayed in the Kowloon flat of a friend, who was the maid's employer. On the morning of February 6, while only the maid and her two-year-old charge were at home, Tangkao forced himself on the woman. He gave her a laisee packet containing $300 afterwards, but she refused to accept it and called the police. Tangkao, in his defence, maintained that it was the maid who initially wanted to have sex, and that she had pulled him into her room. In mitigation, his counsel Jeremy Cheung said that what his client did on the spur of the moment had brought shame on himself and his family. He said Tangkao was brought up in another country and perhaps had mistaken the attitude of a woman with a different cultural background. There was no aggravating feature in the case, said counsel, asking the court to temper justice with mercy.