Force used on George Floyd was 'excessive', police expert says at Chauvin trial – video

The Los Angeles police sergeant Jody Stiger, a use-of-force expert, told jurors at the trial of the former officer Derek Chauvin: 'My opinion was that the force was excessive,' referring to Chauvin's restraint of George Floyd. The Minneapolis police department's coordinator on the use of force, Lt Johnny Mercil, told jurors the neck restraint applied by Chauvin was unauthorised and that officers were trained to use the least amount of force necessary.

Chauvin, 45, who is white, has denied charges of second- and third-degree murder, and manslaughter, over Floyd's death last May, which prompted mass protests for racial justice across the US and other parts of the world. The trial continues

• Chauvin used deliberate and excessive pain technique on George Floyd, police expert says