Why do REALLY think that - depsite hundreds of deaths at the hands of police - not one officer has even been charged?
Lots of police officers have been charged. Some have been convicted. Most such cases get no significant publicity and so you should not fall into the old trap of believing that if you don't know about it it hasn't happened.
But the basic issue is that usually (almost invariably) the situation is such that
some force can be justified and so the issue for the Court (as in the one case you
can remember) is whether the force used was more than was reasonable and necessary in the circumstances ... and, in deciding that, the honestly held belief of the person using the force is pretty much a determining factor (this is general law -it is not something special for the police).
Yes, there have been, and continue to be, a number of issues connected with the investigation, decision making and prosecution of allegations against police officers, but there is not a wholesale cover-up / exemption from the law on the scale that you claim.
The
perception of cover-up is not helped by the making of administrative decisions behind closed doors by the IPCC / CPS. But that doesn't mean that those decisions are wrong, or part of a conspiracy of any sort - those of us that know how they operate (and who have been on the wrong end of such investigations) know that they
are (for the most part) thorough, independent and based on a proper consideration of the evidence. But they rely on paper-based evidence (i.e. there is no cross examination of the witnesses) and they are not in public and so it is inevitable that there is a perception of cover-up by those who do not know.
The response to my posts on this thread (in a situation in which the detail contained in the CPS explanation of their decision is far more than I have know before) illustrates that no amount of explanation or attempts to explain the rationale will dispel those perceptions and that is why I suggest a new "Grand Jury"-style hearing, in which the IPCC / CPS decisions are reviewed in open Court, with cross-examination, in a hearing empowered to overturn those decisions and commit for trial and / or direct disciplinary hearings.
Police officers (and other agents of the state) MUST be accountable to the people for their actions. Personally I believe that they ARE accountable at present, but they are not SEEN TO BE accountable. It is quite right and proper that in serious cases (where death or serious injury results at least) that there should be a public hearing; that the accountability should include personal, oral explanation by the individual officer(s) of what they did and why and that the people (in the person of a counsel for the Grand Jury or, possibly, counsel for any interested party) should be able to cross-examine the officers.