A drink and drug-fuelled knifeman who brutally murdered a “devoted and generous” dad-of-three outside a village pub has been jailed for life. William Cosier will have to serve a minimum of 25 years before he can apply for parole for the fatal stabbing of Adam Pritchard, who was described as “the light” of his parents’ lives. Cosier, known as Billy or Bill, was said to have been “off his head” shortly before the killing, having spent several hours drinking and snorting cocaine at The Queen’s Head in Boughton-under-Blean on March 13 this year. That night, Mr Pritchard, a painter and decorator fr…