The suspects accused in the killing of an Oakland police officer all pleaded not guilty during a court appearance Thursday morning.
Mark Sanders, 27, Allen Brown, 28, and Marquis Cooper, 34, have been charged in the deadly shooting of Officer Tuan Le.
A fourth man, Sebron Ray Russell, has been charged in the burglary associated with the killing.
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Back in December, police responded to a reported burglary at a cannabis business along Oakland's Embarcadero. Le was in plain clothes and driving an unmarked police truck when he was shot in the head.
Police took Le to the hospital, where he later died.
He was the first Oakland police officer to die in the line of duty in nearly 15 years. He was remembered at a public memorial last Wednesday.
