Plenty of police in jail in America. They're just harder to convict. Easier to get them fired. Italy is exponentially worse than America on this issue.

And I say that as an activist against police corruption here who also lives in a murder capital. Police pulling shit that bad here is rare outside the "hoods" where it's thugs and low income people nobody cares about. Still usually just a ticket, thrown on a car, or a brief taser. The worst plant shit on people but they're very rare.