Say that a police officer walks down an alleyway and very clearly sees a crime being committed; say a mugging or a rape. Is the officer legally obligated to try to stop the crime? By “legally required”, I mean that they could be charged with a crime if they do not intervene.
Also, would there be extenuating circumstances based on the likelihood of being able to stop it? For instance, would a group of three armed police officers be required to stop a single unarmed criminal? Would a single unarmed officer not be legally required to stop twenty armed criminals?
This is a purely hypothetical question, not one I am facing.