Protests and riots are ongoing across the country after George Floyd dies, handcuffed in the street. Police officer Derek Chauvin has been arrested in his death. How did a counterfeit $20 lead to him being pinned at the neck by a policeman's knee?Joining Nancy Grace to discuss:Jason Oshins - New York Defense AttorneyCaryn Stark - NYC PsychologistJames Shelnutt - 27-year Atlanta Metro Major Case detective, SWAT OfficerJoseph Scott Morgan - Professor of Forensics Jacksonville State University, Author of "Blood Beneath My Feet"Sierra Gillespie - Investigative Reporter, CrimeOnline