Floyd had been in cardiac arrest before arriving at the hospital and doctors worked on him for roughly half an hour after his arrival.
The trial of a former Minneapolis police officer in George Floyd's death is expected to turn toward the officer's training on Monday after a first week that was dominated by emotional testimony from eyewitnesses and devastating video of Floyd's arrest.
Jurors will be allowed to hear Derek Chauvin's voice and see his reactions in the immediate aftermath of George Floyd's death as the second week of the Minneapolis police officer's murder trial began with Judge Peter Cahill granting the defense a partial victory ahead of today's proceedings.
This may help prosecutors, who have suggested they will argue that asphyxiation was the cause of Mr Floyd's death - contrasting the ruling of the medical examiner who said Mr Floyd died of "cardiopulmonary arrest", which means a person's heart and lungs have stopped.
Floyd's treatment by police was captured on widely seen bystander video that soon sparked protests that rocked Minneapolis and quickly spread to other US cities and beyond.
The Associated Press reports that testimony on Monday will move toward Chauvin's training as a police officer. He said there is an approximately 10% to 15% decrease in survival for every minute that CPR is not administered.
In testimony later that day, Arradondo agreed when prosecutor Steve Schleicher said that some people become more vulnerable when under the influence of drugs or alcohol. He also had Arradondo agree with him that a police officer's use of force is often "not attractive".
"We don't have the luxury of going up to a community member and saying, 'those 99 other calls I've been on went great, trust me, '" Arradondo said, adding that training is important because the "first time someone encounters a police officer may be the only time".
Before he was pinned to the ground, a handcuffed and frantic Floyd struggled with police who were trying to put him in a squad vehicle, saying he was claustrophobic.
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On Friday evening, the 74-year-old singer and actress said in a since-deleted tweet: "Was talking with Mom & She Said "I Watched Trial Of Policeman Who Killed George Floyd, & Cried".
On Monday, under questioning from prosecutor Matthew Frank, Arradondo said it's the police department's policy that officers should consider minimizing physical force during an arrest even while force is being used to restrain a suspect.
Prosecutors countered that the video depicted the moment when paramedics arrived and Chauvin had removed his knee from Floyd's neck to get up. Another checked Floyd's wrist for a pulse and said he couldn't find one.
The officers also rebuffed offers of help from an off-duty Minneapolis firefighter who wanted to administer aid or tell officers how to do it.
"Once Mr Floyd had stopped resisting, and certainly once he was in distress and trying to verbalise that, that should have stopped", Arradondo said. "Chauvin knew what he was doing".
Blackwell, who headed the police training unit, was shown a picture of Chauvin kneeling on Floyd's neck and asked if that was an approved neck restraint. Arradondo and Mayor Jacob Frey also made several policy changes, including expanding requirements for reporting use-of-force incidents and documenting attempts to de-escalate situations.
Prosecutors have already called supervisory officers to build the case that Chauvin improperly restrained Floyd. A duty sergeant and a lieutenant who leads the homicide division both questioned Chauvin's actions in pinning Floyd after officers responded to a report that Floyd had passed a counterfeit $20 bill.
Webber reported from Fenton, Mich.