I assume you're presenting this as one of the extremely flawed arguments that defenders of police impunity use--but that seems improbable, even as a strawman ar

I assume you're presenting this as one of the extremely flawed arguments that defenders of police impunity use--but that seems improbable, even as a strawman argument. Why would the possibility of being videotaped doing an admirable and effective job make a policeman less likely to do an admirable and effective job?