You did all the right things, although not necessarily in the right order. But that's not really an issue. Let me know if you need help with the LEOs.
At this point, the LEO should reach out to the FAA's LEAP (Law Enforcement Assistance Program)...
The Manti does is not ASTM compliant, and ParaZero discontinued their PRS. Unfortunately there are now no longer any PRS available for the Mavic 3 Pro.