We desperately need successful prosecutions for this sort of abuse to encourage police persons to act responsibly for their
own sakes, since they repeatedly demonstrate that they subjugate the rights of the public far too swiftly.
The number of high-profile examples of police escaping the justice they're enforcing so very badly is mind-boggling. Cressida Dick's promotion simply astonsihes me still.
You'd hope that the prevalence of video-camera-phones etc would redress the balance as police become aware they're liable to verifiable scrutiny, but it doesn't yet seem to be helping, just making us more aware of the problem 
