Doctor Testifies George Floyd Died From Lack of Oxygen

Dr. Martin Tobin, a pulmonary specialist who works in critical care, testified Thursday that George Floyd died from a lack of oxygen, bolstering the prosecution's argument that former Minneapolis police officer Derek Chauvin caused Floyd's death last May.

Tobin is appearing as an expert witness for the prosecution. He said the state asked him to review documents and videos depicting the circumstances of Floyd's death. Tobin watched some of those videos hundreds of times, he said.

"Have you formed an opinion to a reasonable degree of medical certainty on the...

Testimony in the trial of former Minneapolis police officer Derek Chauvin continued Thursday with a breathing expert saying that George Floyd died due to a “low level of oxygen” that caused brain damage, rebuking the defense’s argument that drugs contributed to Floyd’s death. Martin Tobin, a pulmonologist and national breathing expert from Hines, Ill., offered testimony as an unpaid witness that Chauvin’s knee was on Floyd’s neck for the “vast majority of the time” and that the pain from the pressure applied by the officer to Floyd was comparable to...