By Emily Allen PUBLISHED: 12:08 EST, 19 August 2013 | UPDATED: 01:39 EST, 20 August 2013 A man who punched and kicked a grandfather to death 'for no apparent reason' has been told he must serve at least 12 years in prison for the murder. Keith Wright, 50, was subjected to a sustained attacked as he was waiting for a bus in York in January. A jury at Leeds Crown Court heard how Liam Matthew Wyard, 20, left Mr Wright fighting for his life with serious brain injuries after punching him to the ground and then kicking him in the head as he lay unconscious on Acomb Road in the city.
@highlight
Keith Wright, 50, died 10 days after the attack suffering from brain injuries
@highlight
Both Liam Wyard and Aaron Wootton had been drinking before the attack
Aaron Wootton, 17, formerly of @placeholder, was found guilty of manslaughter for his part in the attack and was jailed for three years, police said.