I can definitely understand you freaking out when you first heard, but it sounds like this guy's pullin your chain. He wouldn't call you and tell you he's a junior cop and the cops have your house bugged. I'm assuming you're living with your parents (seeing as your 15), so if ANYTHING happens the cops would call your parents. Not trying to be a dick, just tryin to tell ya you'll be alright. And the cops aren't gonna send a 15 year old kid to jail for smoking weed, they have bigger fish to fry.