“In a word – don’t. You are dealing with perhaps the worst possible tag-team combination: Someone with legal power over you who is held to a different – and far more lenient – standard than you are. A cop can: Commit assault with near-impunity. He can draw his firearm and point it at you – even shoot at you – without fear of life-altering consequences – such as a felony record for brandishing and reckless endangerment. He can rely on his cronies and the system to cover up or minimize his errors of judgment, even when they involve serious harm to innocent people such as yourself. His word will be treated as legal tender in court – while yours is considered suspect. His very person is anointed.”
http://ericpetersautos.com/2013/08/23/dealing-with-cops-these-days/