The Walmart truck driver who caused the pile-up that critically injured actor Tracy Morgan pleaded not guilty to all charges in a court in New Jersey.

The crash killed comedian James McNair, who performed as "Jimmy Mack" and injured four others including Morgan who suffered broken ribs, a broken nose and a broken leg.

Police say the truck driver failed to see the traffic slowing in front of him due to lack of sleep. He’s charged with vehicular homicide and assault by auto.