The sister of a murderer was dragged screaming from court yesterday when her husband, the killer's accomplice, was jailed for more than five years. So Man, 40, leaped to her feet screaming that her husband, Pak Kam-shing, was innocent of any involvement in the murder by her brother, So Woon-kau, of Kwun Tong factory owner Chan Ho-wai, 52, on April 11 last year. Mrs Justice Verina Bokhary cleared the High Court because of the disruption during the sentencing of Pak, 38, and So, 37. Pak was sentenced to five years and four months for helping So and for the unlawful burial of a corpse. So, who denied murdering Chan, was handed a life term. He had lured Chan to a deserted toilet in the factory, battered him with a 12-kilogram sledgehammer and entombed his body in cement. Chan was probably buried alive. Outside the court, Chan's daughter, Chan Mei-lin, 26, said her father had treated So with special affection and loaned him $20,000 for gambling debts. The day after he was killed, Chan's family received a $6 million blackmail demand from So.