I.E. just because police don’t “waste” time investigating a crime with $1000 of damage to your personal property does not mean they won’t dedicate the time to pursue $200 in losses for the local mega mart.
If you funded your own private investigation which unambiguously identified the culprit and demonstrated damages sufficient for a felony I imagine the local police would readily act on your behalf as well.
There’s plenty of documented cases where local police are the basically henchmen for large corporations, but I’ve seen no evidence of this and believe it’s kind of a fear mongering meme to think they have enough power over them to dictate them to do roundups after the fact. They may however give all the evidence they collect on you to the police with a bow on it and the cops may decide to take it seriously. Where I am, I do not see this happening. The police will have expected the retailer to have protected their inventory. Off duty police officers make a lot of money working private security and they don’t want to disturb that dynamic.