Newark, N.J. — Federal investigators have scheduled a hearing to determine the probable cause of the highway accident that injured actor-comedian Tracy Morgan and killed one of his friends. 

The National Transportation Safety Board will meet next Tuesday in Washington, D.C.

A Wal-Mart truck slammed into the back of a limo van carrying Morgan and the others back from a show in Delaware last June. Comedian James "Jimmy Mack" McNair was killed, and Morgan suffered head trauma, a broken leg and broken ribs.

A preliminary NTSB report found truck driver Kevin Roper was driving 65 mph shortly before the crash, in an area where the speed limit had been lowered from 55 mph to 45 mph that night because of construction.

Morgan settled a lawsuit against Wal-Mart in May.