When I saw this video loading up at Maggie's Farm, I scoffed. Good people try to help the police in their investigations. Innocent people have nothing to fear. It's like helping people in trouble, picking up your litter, or giving directions to strangers. This law professor convinced me otherwise.
If that's not enough to convince you, Part Two is a police investigator who has done thousands of interviews. (Download time is long).
There is plenty of time to help the police with their investigation - after you have consulted with your attorney. The Fifth Amendment is there for a reason.