Dr. Martin Tobin, Chauvin trial expert witness, dismisses overdose

MINNEAPOLIS – This was a video that has been shown repeatedly to everyone in court, with George Floyd attacking Derek Chauvin’s knee on the street with his neck. But this time, it was slowed down, so the jury could see a brief extension of Mr. Floyd’s eyes – the expert witness on the stand on Thursday said it was his final conscious moment.

Dr. Martin Tobin said, “One second she is alive, and one second she is no longer,” Witness said, “This is the moment when life goes out of his body.”

Dr. Tobin, a pulmonologist who specializes in the mechanics of breathing, presented the prosecution’s first extended testimony to a central question in Mr. Chauvin’s murder trial: how George Floyd died. “You see a fatal injury to the brain from lack of oxygen here,” Dr. Tobin said.

Dr. Tobin said Mr. Chauvin and other police officers stopped Mr. Floyd’s breath by leveling his rib cage against the pavement and pushing his clenched hands into his torso, and placing Mr. Chauvin’s knees on his neck and back. gave.

The doctor pointed to the moment in which he said that Mr. Floyd had shown signs of brain injury, four minutes before Mr. Chauvin lifted his knee from his body.

After two days of tedious law enforcement testimony on occasional procedures and policy, Jr. Drs. Tobin appeared dissatisfied with Tobin’s ability to break down complex anatomical concepts, sometimes crushing notes in a unicorn.

Leaning into the microphone, ask a little tie, dr. Tobin used his hands and elbows to show how people breathe. He gave anatomy lessons by asking gamblers to pin their necks, and an artist’s rendition of how three officers, including Mr. Chauvin, were stationed on Mr. Fluid.

He gave his opinion as a clause without any ambiguity, noting that his conclusion was based on “very precise” scientific knowledge, like oxygen levels when one loses consciousness.

Dr. Tobin said that he had seen excerpts of video evidence hundreds of times. He stated that the weight of Mr. Chauvin’s weight on Mr. Floyd’s neck (86.9 pounds) was the correct amount, Mr. Noted Floyd’s respiratory rate and immediately indicated that he had breathed his last: 8:25:15 p.m.

He reassured the Jura that the many medical terms he had heard during the trial – hypoxia, asphyxia, anoxia – all essentially meant the same thing, “significantly lower levels of oxygen.”

His testimony may have helped prosecutors recover from the fact that the term “asphyxia” was not used in official autopsy reports and made the exact position of Mr. Chauvin’s knees irrelevant, which has surfaced many times .

“I don’t think I’ve seen an expert witness as effective as this,” said Hennepin County’s former chief public guard, Mary Moriarty, who is following the television trial. “He seems to be the world’s leading expert on this, and he explained everything in English in layman’s terms.”

The jury has repeatedly heard that police officers are taught that stopping people facing them is dangerous. Dr. Tobin went through the jury explaining exactly why, first, that simply being in a prone position reduces lung capacity.

Above him, a knee on the neck narrowed Mr. Floyd’s airway, he said, and the weight on his back alone made it three times harder than usual to breathe.

Dr. Tobin discounted the repetitive adage that anyone who could talk could breathe, calling it “a very dangerous mantra”.

This is technically true, he said, but “it gives you a big mis-sense of security.”

“Certainly at the time when you are speaking that you are breathing,” he continued, “but it does not tell you that you are going to breathe after five seconds.”

Using video stills, Drs. Tobin attempted to show that Mr. Floyd had freed his torso enough to breathe, trying to use his shoulders, his fingers, and even his face, flat against the pavement. As, leveled against the weight of Sh. .Chavin.

He said that Mr. Chauvin’s toe was lifted from the sidewalk, and that Mr. The telltale kick of Floyd’s feet stated that, he indicated that he had suffered a brain injury 5 minutes 3 seconds before Mr. Chauhan’s knee. On Mr. Floyd’s neck.

The prosecution has given Dr. Tobin used the preceding strike hole in the defense’s plea that Mr. Floyd died of fentanyl, underlying heart disease, and other physical ailments.

Dr. “A healthy man under Mr. Floyd could have died,” said Tobin.

Dr. Tobin was born in rural Ireland, attended medical school in Dublin and spoke with a soft Irish. He is a physician in pulmonary and critical care medicine at Edward Hines Jr. Hospital and Loyola University Medical Center in the Chicago area and has been practicing for more than 40 years, but this was his first time testifying in a criminal case.

He stated that he had testified several times in medical malpractice cases, and that he had waived his usual fee of $ 500 per hour for the Chauvin trial.

Experts say that working for free could cut two ways, either influencing the jury or suggesting that the witness was biased to one side. Mr. Chauvin’s lawyer, Eric J. Nelson, tried to highlight the latter possibility. “You agreed to forgive your hourly rate for this time?” He asked. “You thought this was an important case, didn’t you?”

Dr. Tobin disputed a defense claim that an elevated level of carbon dioxide found in Mr. Floyd’s blood was the result of the use of fentanyl, an artificial ambulance before he was not breathing.

He said that if fenantyl had a significant effect, Mr. Floyd’s respiratory rate would have been slower than normal, and if Mr. Floyd’s heart disease had been severe, it would have been faster. Instead, the rate was normal, he said.

Mr. Nelson, while pressing his argument, said that Mr. Floyd’s death may be an overdose.

He asked if Mr. Floyd’s breath could have been interrupted if he had taken fenantile moments before the police officers brought him to the ground. Dr. Tobin agreed that it could happen but said that Mr. Floyd had never gone into a coma, as if he had been overdosing.

The prosecution on Thursday called two more witnesses to the stand who claimed Mr Floyd died of an overdose. Daniel Isenschmid, a forensic toxicologist at NMS Labs in Pennsylvania, where Mr. Floyd’s blood was tested, said fentanyl levels in his system were clearly fatal. He said it was common for drunken drivers to find higher levels of the drug found in Mr. Floyd’s blood.

Dr. Surgeon of the Louisville Metro Police Department and a professor of emergency medicine at the Louisville School of Medicine, Drs. William Smock said that Mr. Floyd would have felt even more depressed if he had been experiencing a fentanyl overdose. he is nervous. he is talking. He is not snoring, ”Dr. Smoke said.

“He is saying, ‘Please, please get away from me. I want to breathe. I can’t breathe.’ This is not fentanyl overdose. He is begging for breath.”

Reporting was contributed by Nicholas Bogel-Burrows And Tim Arango From Minneapolis, John eligon From Kansas City, Mo., and Sherry Fink And Haley Willis from New York.

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