Lost dog option?

[kdsorceress.livejournal.com]

Hey folks!

I live up near Powderhouse, close to Tufts. My roommate found a dog (small, dark fur, short fur, possibly arthretic?) with no information on the collar (just a skull and crossbones)

We don't know what to do and have places to be. Animal control is currently closed, apparently. Does anyone have any ideas, or know someone in south Medford who is missing their small dog?

Thanks!

Edited: We found the dog's owner wandering around late last night looking for him! Thanks for all your suggestions, folks!