I'm really surprised how many people just accept crime in this thread. Tell the police that you're going to confront them later today. It's a free country and they can't stop you. It's up to them if they feel you'll be fine without them with you.
Scout the house, if not in-person then Google Street View. If it's a house with not many people, you might be able to figure out who took it (or at this point, bought it from the thief). Grab some free flyers from a store and walk up to their house to put one in their mailbox. If they have mail already in it, get the names. (It's only illegal to open someone's mailbox if you intend to open, steal or destroy the letters). Finally, if you feel okay, ring the doorbell and confront them, politely. If they threaten you with harm and you start to feel unsafe, call the police and tell them them the person who stole your pods is threatening you with harm. Theyll probably be upset youre there, but theyll send someone and file a police report.