Intellectual property as a concept is incompatible with the continued advancement of human knowledge. Before copyright and patenting, we still had trade secrets and sensitive information, and those things cost us insights into metalworking we are still slowly recovering to this day. We still can’t figure out how Roman’s stumbled upon some of their glass blowing breakthroughs, and we just recently figured out Roman concrete.
Capitalism didn’t invent greet, but it’s certainly allowed greed to flourish as a core precept of its design.
That would be the wrong approach. First big problem is that cops or anyone else can wear gloves. Second, you aren’t really trying to prove who owned the drugs. You would be interested in proving that the space in which the drugs were found previously did not contain the drugs before the cops “found” them. That’s why bodycams are super important. Most evidence tampering cases boil down to “spot was clearly empty before cop mysteriously produces drugs from the same spot”