Sleeping cop

Carpundit is walking home yesterday when he sees a seemingly empty Boston police cruiser in front of DeLuca's. Only it isn't:

... When I got close enough, I saw that the officer was in the car - sound asleep. The window was down, the car running, and he was slumped slightly to the right, head on chest, drooling just a little. This was in broad daylight, at commuter time, in front of a popular market. I went inside to buy my wine (and, I confess, a little goat cheese with garlic and herbs along with some Carr's crackers), chuckling.

When I came out, he was still there. What to do?

Naturally, being a man of action (and a former cop himself), Carpundit springs into action and actually does something (after first cursing himself for not having remembered to bring his digital camera with him).