The American teenager who made the footage of black arrestee George Floyd’s death in May testified on Tuesday in the criminal case against Derek Chauvin, the officer. The latter pressed his knee on the victim’s neck for minutes before Floyd’s death.

The images, in which Floyd repeatedly exclaimed in despair that he could not breathe, led to a worldwide storm of anger and numerous demonstrations against racism and excessive police brutality.

Darnella Frazier (18) said during the video making that she already sensed that agent Chauvin’s actions were “incorrect”. Chauvin has been charged with both murder and manslaughter for his role in Floyd’s death on May 25 in Minneapolis, USA.

The video shows that Chauvin, who has since been fired from the police, presses his knee into the neck of a handcuffed George Floyd for more than nine minutes. Floyd, who was arrested for allegedly paying for a pack of cigarettes with a counterfeit $ 20 bill, eventually loses consciousness.

Another witness on Tuesday was a firefighter who said she was stopped by police when she tried to help the unconscious Floyd. A man who had called the police after the incident to report a murder also testified.

Frazier, the teenager who shot the images of Floyd’s agony, tearfully told the court that she imagined her black father or brother could have been a victim in Floyd’s place. “I spent nights lying awake apologizing to George Floyd for not doing more, not intervening physically and saving his life,” said Frazier. However, the teenager also stated, referring to Chauvin, “it’s not about what I should have done, it’s about what he should have done.”

33-year-old martial arts instructor Donald Williams called 911 to report a murder after Floyd was taken in an ambulance. He had recognized the position in which Officer Chauvin had held Floyd in custody as strangulation. “I thought I witnessed a murder,” said Williams. “I didn’t know what else to do.” Part of Williams’ phone call to emergency services was played in court.