This is a cool lecture i just watched. Professor James Duane basically says use your 5th Amendment rights and never, ever talk to the police under any circumstances. He gives examples of 100% innocent people who spent years in jail for crimes they did not commit simply because of what they said to law enforcement.
Regent University has a bad reputation of having a terrible law school, but I think this is pretty cool.
If you have about a half hour to kill, it's worth it.