During the car chase scene which follows the failed bank robbery, there is a brief glimpse of a "flipped" shot, in which it appears as though Sgt. Coker is driving the getaway car from the right hand side, while the left front seat (the driver's seat in left-hand drive cars, naturally) is empty.
All of the military identifications expire December 31st of the year. Military IDs expire on the anniversary of the member's entry into active service or re-enlistment. It would vary for each individual.