MINNEAPOLIS (AP) — A medical examiner’s finding that George Floyd had drugs in his system when he died is a “red herring” designed to draw attention away from the responsibility of a Minneapolis police officer who pressed his knee into Floyd’s neck for several minutes, even after he stopped moving, an attorney for Floyd’s family said Tuesday.

Attorney Ben Crump also disputed an official autopsy that found Floyd’s death was caused by cardiac arrest as police restrained him and compressed his neck in a widely seen video that has sparked worldwide protests.

He said the Hennepin County medical examiner went to great lengths to try to convince the public that what was shown on bystander video didn’t cause Floyd to die.

Floyd’s family and many others have called for more serious charges against Chauvin and for the other officers to be charged.

Ellison told ABC’s “Good Morning America” on Tuesday that despite the widely viewed bystander video of Floyd’s final moments, cases against police officers are hard.