The Walmart truck driver in that deadly accident that injured Tracy Morgan Saturday hadn't slept "for a period in excess of 24 hours" before the incident, according to the criminal complaint.

Kevin Roper, who's been charged with vehicular homicide and assault by auto, was driving a truck for Walmart when he apparently failed to see traffic slowing down ahead of him. He allegedly swerved to avoid a crash and slammed into Morgan's Mercedes limousine bus, causing it to flip. Roper's court appearance today (Monday) in Middlesex County Superior Court in New Jersey was postponed to Wednesday.

James "Jimmy Mack" McNair was killed in the accident, while Morgan suffered a broken leg, a broken nose and several broken ribs.