A triad boss who ordered the attack on an Allied Plaza shop in which one man died had his murder conviction reduced to manslaughter yesterday after the Court of Appeal found the trial judge had given prejudicial directions to the jury. In granting Liu Kwai-wing's appeal against conviction, Mr Justice Michael Stuart-Moore said he had no hesitation in describing the triad-related revenge attack as one of 'the worst cases of manslaughter to come before the courts'. 'Such conduct by callous bosses in triad organisations has to be deterred,' he said, substituting Liu's mandatory life sentence for murder with a 26-year jail term. Hung Hing-tong, 21, died after he was engulfed in a fireball when a lit bottle of paint thinner exploded just outside a ground-floor VCD shop at the Allied Plaza in the Cosmopolitan Centre, Mongkok, at around noon on January 28, 1999. Yeung Yuk-lan, 48 at the time, and Yeung Chin-keung, then 32, were also burned. The three were in the store as customers. Liu, 39, a senior member of the Sun Yee On triad society, denied murder but was found guilty in May last year after a Court of First Instance jury found he had ordered youths to hurl firebombs into the shop in retaliation for an attack on a fellow gang member. But Liu appealed against the conviction, claiming material flaws in Mr Justice Thomas Gall's summation to the jury. Mr Justice Stuart-Moore found Mr Justice Gall's directions were prejudicial as he constantly referred to the words, 'fire bombing' and 'blow up the shop', which erroneously suggested Liu had specifically ordered that the shop be bombed. He said it was crucial that the judge drew the jury's attention to the testimony of arson accomplice Fan Pak-kei, 18, who turned prosecution witness - and told the court he heard Lau Yun-keng, his triad 'big brother', talking with Liu about 'burning the shop'. 'The constant repetition of the suggestion that Liu had ordered the bombing of the shop . . . implied a knowledge on Liu's part that an explosion was likely to take place, giving rise to a virtual certainty that death or serious injury would be caused. 'If Liu had ordered the fire-bombing, such inference might well have been drawn and a conviction for murder might well have been justified.' Fan is now serving a 12-year sentence. Herman Cheung Chi-him, 18, is serving 16 years for the attack and Cheng Yi-on, 20, 15 years. The three had each pleaded guilty to one count of manslaughter and two counts of inflicting grievous bodily harm.