Tuesday, an off duty firefighter said she was 'desperate' to help George Floyd whilst white policeman Derek Chauvin knelt on his neck for nine minutes last spring. 

The statement came during the trial of Chauvin, who is charged two counts of murder and one count of second-degree manslaughter after Floyd, who is Black, died in the incident. 

The defense says Floyd suffocated to death, whilst the prosecution says he died of a heart arrhythmia.

In now-viral videos, Floyd can be heard saying, "I can't breathe," as Chauvin continued to kneel on his neck. 

"There's a man being killed, and had I had access to a call similar to that, I would have been able to provide medical attention to the best of my ability, and this human was denied that right," said the firefighter. 

Other witnesses expressed similar sentiments. 

Floyd's killing led to calls for police reform and racial justice in the US and across the world. 

Chauvin's trial is expected to last at least one month.