Well we have no neutral fact finder, indeed no evidence at all except for OP’s unsworn testimony. That should ABSOLUTELY be enough to be certain beyond a reasonable doubt that this shop stole OP’s CPU, did so deliberately, and would lie when confronted with the accusation. It’s a completely fool proof case and we should bring swift internet justice on this unsuspecting small business owner. It was the business owner, right? Not an unscrupulous employee? Or they at least know about the thefts