I don’t know Canadian drone regulations but in the USA, drones must stay 5 miles away from airports unless they contact ATC or the airport operator before and after a flight. Flying one in the final approach path to an airport is an incredibly dumb thing to do. I’m guessing that the police operator didn’t have a clue what they were doing and should be removed from this kind of duty. GA aircraft can’t see these things in flight because they’re too small, moving quickly relative to the aircraft and may be in a blind spot. Mixing unmanned aircraft with manned aircraft in the same airspace is bound to result in accidents like these until drones are equipped with better “sense and avoid” technology.