The video of a now-former Minneapolis police officer with his knee of George Floyd’s neck has spawned outrage throughout the country. But that move is not a common one in law enforcement. In fact, the Minneapolis Police Department is one of very few to use it. “To see this today is just unbelievable,” said Dr. John Peters Jr., the president of the Institute for Prevention and Management of In-Custody Deaths. His  organization trains police academy instructions on use-of-force.