[Landlord-US-NV] Tenant Drugs Possibly Found

What procedure would you follow if you find a large gallon size ziplock bag filled with white powder (seems like cocaine) hidden in your property’s garage after tenant is finally evicted and has vacated? Everyone is assuming it’s drugs due to number of strange cars pulling up to the house in the last month, at all hours, for a couple of minutes, and leaving again. Dispose of bag and be glad you’re rid of them? Call the police and report? List a ziplock bag of unknown powder as part of the random items they left behind so they can pick it up or instruct to throw away? Advice appreciated.