The Lodi Case: Overly Zealous, Unprofessional FBI
These are examples of how NOT to conduct an interrogation. I say that because I personally knew Professor Fred Inbau, the man most responsible for developing techniques for modern criminal interrogations...and because the ex-FBI consultant in the piece confirms my belief.
This is pretty scary---it demonstrates with painful clarity what can happen when the Fed Govt thinks you're guilty, and you don't exercise your right to an attorney before questioning. As the ex-FBI consultant stated, "It's shameful.".