A trained MMA fighter who personally witnessed the death of George Floyd testified that officer Derek Chauvin used a "blood choke" during the arrest ... referring to the move as "torture."
33-year-old Donald Williams is a fighter out of the Minnesota Martial Arts Academy in Brooklyn Center ... and has a 6-6 record, according to Tapology.
Williams appeared on the stand in a Minnesota courtroom to testify about what he saw on the day Floyd died ... and his explanation was almost identical to the analysis of UFC superstar Jon Jones, who spoke out in the days following the incident.