A grand jury is key. That's the ONLY way you cut through the bulls--t excuses about "We can't testify because of the feds" or "I have FOP contract rights." In a grand jury, you either tell what you know or you take the 5th and appear like a criminal who needs to be indicted too. Patty cake time ends. An investigation with no grand jury this late in the game isn't a real investigation. I'm looking at you federales.