I travelled to russia earlier this year and if you were to get in trouble with the police, you had to pay them to not take any further action. In Russia there were phrases you would use such as "Is there any way we can resolve this here?" or "Is there anything i can do for you officer so we have no problems?". If you are to get in trouble with the police in mexico, is it basically along the same lines as above to offer a bribe without saying "How Much???" or will giving a copper money land you in some serious trouble?