evidence: The video shows police officer Derek Chauvin with his knee on Mr Floyd for more than nine minutes, and Mr Floyd begging not to be harmed. [...] In opening statements on Monday, Prosecutor Jerry Blackwell told the jury that Mr Chauvin had "betrayed his badge" by kneeling on Mr Floyd's neck, and using "excessive and unreasonable force" to detain him. [...] The video footage of Derek Chauvin kneeling on George Floyd's neck last May was watched around the world.