{UAH} Police surgeon: George Floyd died of positional asphyxia, or lack of oxygen

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Dr. William Smock, the police surgeon and director of the Clinical Forensic Medicine Program for the Louisville Metro Police Department, testified that George Floyd died of positional asphyxia, or lack of oxygen. 

"Mr. Floyd died from positional asphyxia, which is a fancy way of saying he died because he had no oxygen left in his body," Smock said. "When the body is deprived of oxygen, in this case from pressure on his chest and back, he gradually succumbed to lower and lower levels of oxygen until it was gone and he died."

Smock testified that he came to that conclusion after ruling out other causes of death, including fentanyl overdose.

Smock, a former medical examiner, is the second witness to testify Thursday that Floyd died from low or no oxygen. 

Earlier, Dr. Martin Tobin, a world-renowned expert on breathing, said Floyd died from a low level of oxygen.

"Mr. Floyd died from a low level of oxygen, and this caused damage to his brain that we see, and it also caused a PEA (pulseless electrical activity) arrhythmia because his heart stopped," Tobin said.

https://www.nbcnews.com/news/us-news/live-blog/derek-chauvin-trial-2021-04-08-n1263412 

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