shy_man...
Without getting too far into this subject, which is the focus of much attention in most law enforcement academies in the US, there are two views from the bench regarding police.
On the one hand, what they say may be given more weight because they are (supposed to be) trained observers, dedicated to justice, etc., etc.
On the other hand, because of thier training, in law, use of force, weapons, etc., they are generally (not always) considered to be 'held to a higher ' standard than the average citizen.
In other words, we expect them (police) to be better in law enforcement duties because we have spent a great deal of money and time insuring that they are. This 'higher' standard argument can break down when it is blatantly disregarded, as in the case of our most recent ex-President. It is, however, the way I was trained, and I expect more from a legally knowledgeable public servant than I do a school teacher or auto mechanic.
Again, sometimes our higher expectations are met with lower results, but, on the whole, by a small percentage of law enforcement overall. The vast majority of police officers look at this issue as I do, I think. When the failings of the minority are exposed, it generally results in the accused going free, if not immediatey, then eventually.
Nothing's perfect. But most of us do try. Politicians are a glaring exception.