Over on the Huffington Post, Scott Morgan has an article entitled 5 Reasons You Should Never Agree to a Police Search (even if you have nothing to hide). I highly recommend reading it and passing along the link.
Here is one of his “five reasons”:
Refusing a search protects you if you end up in court.
It’s always possible that police might search you anyway when you refuse to give consent, but that’s no reason to say “yes” to the search. Basically, if there’s any chance of evidence being found, agreeing to a search is like committing legal suicide, because it kills your case before you even get to court.
If you refuse a search, however, the officer will have to prove in court that there was probable cause to do a warrantless search. This will give your lawyer a good chance to win your case, but this only works if you said “no” to the search.
Check it out!