Duty and courage are different things - the first is pablum that comes from without - the second is commitment that comes from within. Police everywhere are sworn to protect. That means risking their lives to catch criminal suspects. Outside of the US, cops go along to get along.
The US Supreme Court begs to differ.
Warren v. District of Columbia, 1981
"Risking their lives" is merely following their "confrontation" training, or departmental policy.
There didn't used to be "police everywhere". Our Owners had to wait till well after the Founders all died to implememt the Police State.
There didn't used to be "prosecutors everywhere", either, in the beginning of the Republic. Full-time police & prosecutors are a relatively new thing.
Once they figured out how to keep the perpetual funding pump primed (catch & release on guys like Daron Wint & Brack Oblabya), the taxpeasants were toast.