Derek Chauvin broke Minneapolis police department rules and its ethics code in his deadly arrest of George Floyd last May, the city's police chief testified at Chauvin's murder trial on Monday.
"That is not part of our policy, that is not what we teach..." Chief Medaria Arradondo told the jury.
Chauvin, who is white, was caught in widely seen bystander videos kneeling on the neck of Floyd, a 46-year-old handcuffed Black man, for more than nine minutes.
Chauvin has pleaded not guilty to murder and manslaughter charges. Prosecutors have called Arradondo and other police officers to undermine Chauvin's defense that he did only what he was trained to do in his 19 years as a police officer.
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