The last (and so far only) time I was called for jury duty, the judge's instructions were very explicit that the word of a police officer was to be given no special weight compared to other witnesses.

Jurors were questioned about this during the voir dire, and several people were dismissed because of an admitted bias in favor of police testimony.

Obviously, this is a sample size of one and no generalizations can be drawn, but it does stand as a counterexample.