Over 19 witnesses have testified in the trial of Derek Chauvin, the former Minneapolis police officer charged with second-degree murder, third-degree murder and second-degree manslaughter for his involvement in the death of George Floyd on May 25, 2020.

Evidence presented in court included witnesses’ cellphone videos, police body cam footage and security footage from a gas station that overlooked the curb outside Cup Foods, the business where the incident took place.

“To continue to apply that level of force to a person proned out, handcuffed behind their back—that in no way, shape or form is anything that is by policy. It is not part of our training. And it is certainly not part of our ethics or our values,” testified Medaria Arradondo, the Minneapolis Police Chief.

Darnella Frazier, the teen who recorded one of the most-circulated videos of Chauvin kneeling on Floyd’s neck for 9 minutes and 46 seconds, said that she must have walked to the store “hundreds, maybe thousands” of times.

“It wasn’t right,” she told the court after the live video feed was turned off for her safety. Floyd “was suffering, he was in pain.”

Other witnesses include MMA Fighter Donald Williams, who said he “felt the need to call the police on the police” because he was witnessing “a murder.” Jena Scurry, a 911 dispatcher, said she called a police sergeant while watching the incident on a video feed because she feared “something was wrong.”

Chauvin, 44, has pleaded not guilty to the charges. His defense team, led by attorney Eric Nelson, has claimed the force was necessary because of Floyd’s behavior and that drug use and underlying conditions were the cause of his death.

The autopsy from the Hennepin County Medical Examiner’s Office described that Floyd “became unresponsive while being restrained by law enforcement officers; he received emergency medical care in the field and subsequently in the Hennepin HealthCare (HHC) Emergency Department, but could not be resuscitated.”

However, in a press release, the cause of Floyd’s death was named as “cardiopulmonary arrest complicating law enforcement subdual, restraint, and neck compression.” It was also ruled to be a homicide

The trial is ongoing and is expected to continue through the end of April amid protests and demonstrations demanding justice for George Floyd.