I'm with JP on this.

The odds are excellent that this guy has been doing this for a long time. Look at the arrogance, him out talking with the shop owner while displaying the fruits of his theft.

If this was a one-time occurrence, you know he'd be lots more guilty and secretive about it, that's human nature.

He doesn't deserve to have that job. But really, I'll bet he will have some story about it, and the evidence is circumstantial. Odds are the postal union will back him and he'll likely keep his job anyway. Of course if they actually open an investigation and tail him ...