Knee on subdued suspect’s neck not allowed, police trainer tells Chauvin trial

• Lt Johnny Mercil tells court use of force has to be reasonable
• Derek Chauvin trial - live coverage

A Minneapolis police trainer who instructed Derek Chauvin in the use of force told the former officer's murder trial on Tuesday that placing a knee on a suspect's neck when they are already subdued is not authorised".

Related: Chauvin's use of force on George Floyd was 'in no way' policy, says police chief