A security-camera scene of people joking around inside the store soon gave way to the sight of officers pulling Floyd from his vehicle at gunpoint, struggling to put him in a squad auto as he frantically said he was claustrophobic, and then pinning him to the pavement.

"But we've got to control this guy because he is a sizable guy", he told McMillian. "It looks like he's probably on something".

Additional video showed McMillian telling the officers that putting a knee on Floyd's neck was not right while still encouraging Floyd to comply and get in the auto.

FLORIDO: Yeah, the witnesses today included Darnella Frazier - she's the teenager who filmed the cellphone video of Floyd's arrest that so much of the world has seen by now - also an off-duty firefighter who stumbled upon the scene.

Mr McMillian said he remembers feeling "helpless" seeing the incident unfold.

The most powerful moment during McMillian's testimony arrived as he broke down into tears on the stand watching the playback of the gruesome video.

Asked by a prosecutor why he did so, Mr McMillian said: "Because what I watched was wrong". "I don't have a mama either; I understand him".

Prosecutors played police bodycam video of Mr Floyd pleading that he is "claustrophobic" and calling for his mother as the officers attempted to place him in the auto.

Prosecutors also played store security footage showing Floyd in Cup Foods for about 10 minutes, adding to the mountain of video documenting what happened.

Mr Chauvin, a 19-year veteran of the police force, faces up to 40 years in prison if convicted of the most serious charge - second-degree murder. But he described Floyd as friendly and talkative.

Prosecutors are seeking to demonstrate to the jury that Mr Chauvin had no justification for using a unsafe neck restraint on a compliant Mr Floyd. "You can believe your eyes".

The defence has argued that the now-fired white officer did what his training told him to do and that Floyd's death was not caused by Chauvin's knee on his neck, as prosecutors contend, but by a combination of illegal drug use, heart disease, high blood pressure and the adrenaline flowing through his body.

Floyd seemed to take time to find his words but replied that he played football, Martin said.

"If I would've just not taken the bill, this could've been avoided", Martin lamented, joining the burgeoning list of witnesses who expressed a sense of helplessness and lingering guilt over Floyd's death. He stopped working there soon after because he said he didn't feel safe. And Donald Williams, who is Black, spent several minutes pleading with officer Chauvin and, in some cases, insulting him as he pinned Floyd down. "But it's not what I should have done, it's what he should have done".

CCTV footage of George Floyd, right, inside Cup Foods on May 25, 2020, in Minneapolis. Surveillance video played in court shows Floyd fiddling with items in his pockets and casually interacting with other customers and employees. But he said he accepted it, despite believing the amount would be taken out of his paycheque by his employer because he did not think Floyd knew it was counterfeit and "I thought I'd be doing him a favour".

Martin said he told the store manager about the fake bill, however, and the manager eventually called the police.

Mr Martin told the jury he had sold Mr Floyd a packet of cigarettes, and received a counterfeit note as payment.

Floyd is handcuffed and taken to a squad auto where he becomes increasingly distressed and struggles with the officers who are trying to put him in the back of the vehicle. Today's last witness was an off-duty paramedic named Genevieve Hansen.

Martin was among several people who have testified about their frustration and anger as they witnessed Chauvin kneeling on Floyd's neck outside a convenience store last May. Nelson asked her if she showed the police her firefighter identification.

"I tried calm reasoning, I tried to be assertive, I pled and was desperate", she testified.

Hansen became combative with Nelson, the defense attorney, during Tuesday's cross-examination, repeatedly taking issue with his questioning and responding with snark. You can't paint me out to be angry. "He just wasn't following instructions", Officer Thomas Lane was recorded saying.

DONALD WILLIAMS: No, I grew professional and professional, and I stayed in my body. "You can't paint me out to be angry".