Tobin testified on Thursday (April 8) that George Floyd died from a lack of oxygen caused by being handcuffed face down in the street with the former Minneapolis police officer's knee on his neck.
Using anatomical diagrams and excerpts from videos of the arrest, Tobin said the medical evidence contradicted Chauvin's assertion that Floyd may have died from a drug overdose, and that any "healthy person" would have died in a similar restraint, which Tobin compared to a vice.
Video of the arrest, widely viewed on social media, showed Chauvin, who is white, pinning Floyd's neck to the ground with his knees for more than nine minutes as Floyd, a 46-year-old Black man, begged for his life, gasping more than two dozen times: "I can't breathe."
Chauvin has pleaded not guilty to murder and manslaughter charges.
- Now, Doctor Tobin, were you-- were or are you aware that Mr. Floyd had some pre-existing health conditions?
MARTIN TOBIN: Yes, I am.
- And how are you aware of that?
MARTIN TOBIN: I mean, I read them in the records from Hennepin County, and obviously, saw-- also saw them mentioned in the autopsy.
- Do you have an opinion to a reasonable degree of medical certainty as to whether a person who had none of those pre-existing health conditions, a healthy person, would have died under the same circumstances as Mr. Floyd?
MARTIN TOBIN: Yes, a healthy person subjected to what Mr. Floyd was subjected to would have died as a result of what he was subjected.