No good deed goes unpunished.
My husband and I saw a motorcycle have an accident a few cars ahead of us, stopped to see if he needed help and to call 911, but we saw a sheriff just up the road so we drove there to get him instead. By the time we got to him, another car was already getting him and there were already lots of people on the scene, and the motorcycle rider was getting up off the ground so we figured he had enough help and drove on toward home. A sheriff pulled up behind us and turned on his lights for us to stop, so we pulled over and he asked for license and registration and asked us to come back with him to the scene of the accident because he said he had witnesses there that said that we caused the motorcycle's accident.
Fortunately, the motorcycle rider said that we were not involved, that it was a white truck who caused the accident, so after the sheriff unsuccessfully tried to locate his "witnesses who said that we were involved" he finally apologized to us and said that we were free to leave. Apparently the so-called witness against us was the driver of the white truck and when the sheriff took off after us, he told the other people who stopped that he had to go to work and he left.