New York ( CNN ) -- Former pro basketball star Jayson Williams was sentenced to an additional year in prison Friday after he pleaded guilty to a misdemeanor charge of driving while intoxicated , according to the Manhattan district attorney 's office . Williams had a blood-alcohol level of more than twice the legal limit when he crashed his Mercedes into a tree in lower Manhattan in January -- just a week before he pleaded guilty to aggravated assault for accidentally shooting and killing a limousine driver in New Jersey , the district attorney 's office told CNN . The year will be added on to the current five-year prison sentence the former NBA player is serving in state prison in New Jersey . He also was also slapped with a $ 16,433 fine to repair the tree he hit . Williams had been sentenced to five years in prison after fatally shooting his limo driver , Costas `` Gus '' Christofi , in February 2002 at his New Jersey estate . Christofi had been hired to drive the former athlete and several of his friends to dinner after a sporting event in Pennsylvania . The group , including four members of the Harlem Globetrotters , later went back to Williams ' home . The prosecution argued that Williams was recklessly handling a 12-gauge shotgun when it discharged and that he and two others tried to make it look as if Christofi had shot himself . Williams , who retired from the NBA in 1999 because of a leg injury , played nine seasons with the Philadelphia 76ers and the New Jersey Nets .
Jayson Williams is sentenced for driving while intoxicated . The former Nets point guard was found guilty of DUI and reckless endangerment in a New York City courtroom on Tuesday after he crashed his car into another vehicle at high speed during an alcohol-fueled Williams played nine seasons in the NBA before retiring in 1999 .