Murderer screams obscenities at judge, who denounces 'cruel and dreadful' act A killer screamed obscenities from the dock and called a judge a dog yesterday after he was handed a life sentence for the murder of his niece. It took four prison guards to restrain and handcuff Lee Kwok-oi, 32, before dragging him away screaming. Minutes earlier, an all-male jury had re-entered the courtroom after just 90 minutes of deliberation and returned a guilty verdict over the murder of Tse Oi-lam, 10. Lee initially showed no emotion on hearing the verdict, but launched into the abusive tirade when Mr Justice Colin Jackson said he would receive the mandatory life sentence. He yelled out, 'You dog judge' and 'It's not fair', as well as a stream of obscenities. He could still be heard from behind closed doors several minutes after being dragged from the dock. The Court of First Instance heard Oi-lam was killed in an attempt to extort $500,000 from her family. Lee, a decoration worker, denied murder but, during a separate court appearance, he pleaded guilty to kidnapping Oi-lam and received a 16-year jail term. Mr Justice Jackson said yesterday the victim had been an 'innocent schoolgirl'. 'She trusted you and you betrayed that trust in a cruel and dreadful manner ... 'Words cannot do justice to the enormity of what you did in taking that child's life.' The court had heard Oi-lam was killed on the day she disappeared from her family home on September 21 last year. Her body was found floating off an Aberdeen beach the next day. Investigators matched the wire wrapped around Oi-lam's neck with pieces found in his girlfriend's boat. Oi-lam's mother, Lee Yuk-lan, said she went to Tai Po police station after her daughter's body was discovered and briefly met the accused, who apologised to her.