Years ago I experienced a police officer lie in a court of law to convict me of MIP. As an 18 year old nerd, I didn't even drink or like the taste of alcohol. After that I never trusted the word of a police officer over a private citizen in a court of law.  When it is one person's word against another, with no other witness or evidence, why should the scales tip in favor of the police? Years later I was responsible for a hung jury with a jury of 6 in a situation when it was one person's word against the other.