Day 11 of the Derek Chauvin murder trial got underway in Minneapolis on Monday. The prosecutors are trying to prove Floyd died from a lack of oxygen, a result of Derek Chauvin's knee being on his neck for more than nine minutes. One cardiologist who testified said Floyd's death was "absolutely preventable." Jenny Roberts, the co-director of the Criminal Justice Clinic and professor of law at American University, joins CBSN for a closer look at the trial.
