Images of George Floyd being treated in the back of an ambulance, after a police officer knelt on his neck for more than nine minutes, have been shown to a jury.
The distressing pictures were viewed by jurors during the trial of Derek Chauvin who is accused of murdering the unarmed 46-year-old black man in Minneapolis last year.
Mr Floyd can be seen lying unconscious in the back of the ambulance as he was flatlining.
Paramedic Seth Bravinder was asked whether a delay in giving medical treatment to Mr Floyd may have lessened his chance of surviving.
Watch: Derek Chauvin, the charges he faces and everything you need to know about the police officer's murder trial
Mr Bravinder confirmed it is "important" to start resuscitation efforts as soon as a patient's pulse stops, and that a delay in giving treatment is "not good for the outcome".
The images were shared after Mr Floyd's girlfriend Courteney Ross tearfully told the story of how they first met at a Salvation Army shelter in 2017.
The 45-year-old added that Mr Floyd was a security guard with "this great Southern voice, raspy".
She also recounted how they both struggled with opioid addiction.
Ms Ross said: "Both Floyd and I, our story, it's a classic story of how many people get addicted to opioids. We both suffered from chronic pain. Mine was in my neck and his was in his back.
"We both had prescriptions. But after prescriptions that were filled and we got addicted and tried really hard to break that addiction many times."
Prosecutors put Ms Ross on the stand as part of an effort to humanise Mr Floyd in front of the jury and portray him as more than a crime statistic.
Chauvin has pleaded not guilty to murder and manslaughter charges.
His lawyers argue Mr Floyd's death was an overdose caused by the drug fentanyl found in his blood during a post-mortem.
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