In a home the reasonable suspision of bodily harm. In a car anything in plain view, any suspicious activity by the driver or passenger.
You still have failed to answer my question. How many people have died in a true emergency from not speeding to a hospital?
And just what do you want people to do if they are followed while speeding by a police officer? Just keep going? Hope they get to the hospital before being Pit-ed or blocked in?
Just let them run red lights? Ignore school zones? Because they have an emergency? Is it really an emergency or just some over blown hypochondriac with a sore throat?