Second-degree unintentional murder It’s also called felony murder. To prove this count, prosecutors have to show that Mr Chauvin killed Mr Floyd while committing or trying to commit a felony – in this case, third-degree assault. They don't have to prove the former officer intended to kill Mr Floyd, only that he intended to apply unlawful force that caused bodily harm. Prosecutors called several medical experts who testified that Mr Floyd died from a lack of oxygen because of the way he was restrained. A use-of-force expert said it was unreasonable to hold Mr Floyd in the prone position for nine minutes, 29 seconds, handcuffed and facedown on the pavement.