Comment by skeledrew

By the time authorities get there, if they actually prioritize it (police in many places already have a track record for not being very responsive, unless there're actual signs of a crime), something may have already happened to the child. You don't know because you already left, expecting that someone else will take care of it, when you were already in a position to help ensure that child's safety. No, if you think something might be wrong you stay and monitor the situation best you can, so if something really does begin to actually begin to happen you can be a buffer and/or whistleblow.