[rsobin]

The police are trained to assume that you are lying. Especially when you are under suspicion. Often it is difficult to like people who assume you are a liar. The relationship between civilians and the police is more often than not adversarial for this reason.

[mkjessup]

The police are trained to assume that you are lying.

Then their training is wrong. That philosophy is more at home in a Communist state.

Especially when you are under suspicion.

Suspicion of what? In this case, the vehicle was exceeding the speed limit. If the cop actually determined the vehicle was in excess of the posted limit, it's open and shut. No 'suspicion' is called for.

Often it is difficult to like people who assume you are a liar.

Again, that goes to police state training. Police need to have it drilled into their heads that THEIR salaries are paid by those people they think are 'lying'. They work for US, not the other way around.

The relationship between civilians and the police is more often than not adversarial for this reason.

That relationship began becoming more adversarial with the creeping federalization of local law enforcement and the substitution of 'Suspect the Public' for 'Serve the Public' as an operating philosophy, and only a dummy would deny it.