Local cat people: help!

Coworker's son reported a black kitten by the grocery store. Considering J is in DC overnight and I am car-less, there's not a whole lot I can do as far as trapping him and getting him to a shelter. Anybody local up for an adventure after 6pm?

I can't have any more cats at home (particularly ones that haven't been FeLV/FIV tested), but I worry about black kittens out of doors near Halloween.

Eta: tamnonlinear, cat rescuer extraordinaire, is going to try to help me grab him tonight. Wish us good luck!