What do former Gov. Rod Blagojevich, Martha Stewart, Scooter Libby, Henry Cisneros and so many others have in common? All have been convicted of the crime of Lying to the FBI, and nothing else!!! No other convictions for theft, perjury, anything! In other words, during the investigation of a non crime, a crime was committed that would never have existed if the first non crime hadn't been investigated.
I realize that the last sentence seems hard to wrap your head around, but it is an example of the problem. This is not legal advice, and if you are approached by law enforcement, you should seriously consider getting an attorney before you answer any questions, but DON'T ANSWER ANY QUESTIONS WITHOUT AN ATTORNEY!!!
The policy implications of the crime of lying to the FBI while they investigate a non crime are tremendous. People normally want to have their side heard, and are sure that once it comes out, law enforcement will immediately recognize how reasonable they are and let them go. Trouble is, the cops are probably lying to you throughout the investigation, and that is perfectly legal. Just remember, anything you say, can and will be twisted and used against you later.
If people follow the recommendations of securing a lawyer before they answer any questions, the net result will be fewer convictions because the FBI won't be able to leverage statements made by the accused against them. Their immediate greed will have long term ramifications that they won't want.