If you are 100% certain that no residents are vending product then this is interesting. It certainly doesn't bear the hallmarks of a controlled delivery. Above personal use quantities? And what schedule are we talking about?Some possibilities:-> LE personnel screwed up the CD timing.-> Random chance.-> LE has a new trick.-> Vendors got busted, had stored your information and passed it on.Some questions:-> Did they show a search warrant?-> Are the original vendors still in business?-> No dogs?-> Compare and contrast:     LE with local accents, LE with out of state accents?    What did their clothes look like?     Did they say anything to each other?     If it is remembered, then quote precisely what they said. esp. terminology, slang to each other.If I were to hazard a guess with the information you've given, resident ordered above personal use quantities, a vendor got busted who foolishly had kept resident's address, which generated a follow up knock and talk event later. Otherwise the resident was snitched on by an informant if he distributed the drugs.