I cancel them only when Im 100% sure that they are not needed. If a call comes in the 2 vehicles have hit head on and there are body parts laying about the roadway and I get there and there is a vehicle that bumped another in the rear, then I will cancel. But if Im in doubt then I let them continue on.
I only had one squad that constantly continued on. I had a talk with them and advised them that while I appreciated them they were tying up my accident scene and it will hurt me deeply for them to continue doing this because I would be forced to charge them with Improper Stopping on the Highway. I told them that the judge may throw it out but that they would have to take a day off work to appear.
Im not an butthead but this was after numerous times of one ambulance, one crash truck, and 5 or 6 POV's at a MINOR MVC
"And don't go home, and don't go to eat, and don't play with yourself. It wouldn't look nice on my highway", Buford T. Justice
Before joining Real Police I really believed that the only STUPID question was the one that wasnt asked.