Derek Chauvin trial: Witnesses questioned by lawyers

Donald Williams, the professional mixed martial arts fighter who can be heard in a witness video criticizing Minneapolis police officers during their encounter with Floyd, was called by the prosecution as its third witness Monday.

Williams was walking around the corner from the Cup Foods when he heard a commotion and saw Floyd on the ground with Chauvin kneeling over him, he testified.

Floyd "was speaking in a distressed way" when Williams got there, vocalizing to the officers that he was in pain and that he wanted his mom, Williams said.

"His breathing was getting tremendously heavy," Williams said, adding that it was apparent that he was struggling to gasp for air.

At one point, Floyd's eyes then "slowly rolled to the back of his head" and his nose started bleeding, and soon after he was "lifeless," Williams said.

Williams said his experience as a fighter led him to believe that Chauvin's position on Floyd's neck was putting Floyd in imminent danger.

Another witness on the scene who is a paramedic told the officers multiple times to check Floyd's pulse, but no one did, Williams said.

Alisha Oyler, a shift manager for the Speedway located across the street from Cup Foods, first noticed police officers “messing with someone” when she began watching the encounter involving Floyd, she told prosecutors Monday.

Oyler took seven separate video recordings on her cellphone but could not immediately recall details, stating that it had "been so long."

During a cross-examination, defense attorney Eric Nelson walked 911 dispatcher Jena Scurry through the timeline of the encounter and pressed her on her knowledge of Minneapolis Police use of force policies. 

Nelson seemed to want the jury to know that Scurry was not familiar with how police handled such incidents. 

Scurry acknowledged that she has only seen police incidents play out live on monitors in the dispatch center three to four times in the seven years she has been a dispatcher. 

ABC News’ Whitney Lloyd contributed to this report.

Jena Scurry, the Minneapolis 911 dispatcher, told the court she had a "gut instinct" that something was wrong.

Scurry said she continued to take calls but noticed that the squad car in front of the Cup Foods did not have officers surrounding it.

The next time Scurry looked up, she saw the officers placing Floyd in the back of the car.

Scurry said she later knew "something might be wrong" when she saw Floyd on the ground.

When Assistant Minnesota Attorney General Matthew Frank asked what made her think something was amiss, Scurry said dispatchers rarely see videos of active scenes on those cameras. Moreover, the fact that Floyd went from the back of the squad car to the ground and officers had not requested additional assistance worried her, Scurry said.

"I took that instinct and called the sergeant" who supervises police officers, she said.

Court recessed for lunch after Frank was done questioning Scurry.