The option to report a hidden car is sometimes not specific enough. Sometimes it is a mobile speed camera. Or it’s a phone / seatbelt detector. The road chat option is the closest option we have so far when used along with a police marker. Either that or add the ability for other drivers to give extra info when more information is figured out so if a passer-by notices the report bit it isn’t in-depth enough or is just a bit to far for it to look current. They can add to the marker giving a more in-depth description of where that police car is hidden or what cause the accident marked on the map.