if you happen to have 48 minutes to kill:
Dont Talk to PoliceAn law school professor and former criminal defense attorney tells you why you should never agree to be interviewed by the police. 
http://www.youtube.com/watch?v=6wXkI4t7nucinteresting insight in to why you should never say ANYTHING to the police.  ever.  even if you're 100% innocent and you have a perfect alibi.  virginia law is cited throughout the talk.  in the second half, a VA police officer confirms what the professor said and illustrates some of the techniques he uses to get people to talk.