Derek Chauvin violated Minneapolis Police Department rules and its ethics code on respecting the “sanctity of life” during the deadly arrest of George Floyd last May, the city’s police chief testified at the former officer’s murder trial on Monday.

“It’s not part of our training, and it is certainly not part of our ethics and our values,” said Chief Medaria Arradondo, referring to how Chauvin, who is white, held his knee on the neck of Floyd, a 46-year-old black man, for more than nine minutes.

Arradondo disputed the defence’s claim that Chauvin, who has pleaded not guilty to murder and manslaughter charges, was following the training he had received in his 19 years on the force.