From an earlier post it said running from behind the building was Probable Cause. Don't get Probable Cause and Reasonable Suspicion confused. It makes a big difference in the legal world. You can be arrested based on probable cause, not on reasonable suspicion.
Running from behind a building is Reasonable Suspicion because you still don't have evidence a crime has been committed, but a reasonable person might believe one MAY HAVE BEEN COMMITTED, OR WAS ABOUT TO BE COMMITTED. It would rise to Probable Cause if you saw a broken window in the back of the building, for example.
