Seat belt not needed.

I'm just curious. Every time i drive by a moving police patrol car, I can't help but to take a look at the front passengers (driver included). 10 out of 10, these policemen don't put on the safety seat belt. I am just wondering if these men really worried about crumpled uniforms or their life at stake. Studies have shown, speed kills even with a mere 60kmph. And there you know it, that is why I am not in police force.