The Tulsa police officer accused of first-degree manslaughter in the shooting death of Terence Crutcher has pleaded not guilty.
Officer Betty Shelby entered her official plea during her first court appearance Friday.
Just a day before her court date, one of Shelby's attorneys told reporters she experienced what's called "auditory exclusion" before and during the Sept. 16 shooting.
Attorney Scott Wood told reporters Thursday, "She didn't hear the gunshot, didn't hear the sirens coming up behind her just prior to the shot."
If convicted, Shelby could face life in prison. Her preliminary hearing is set for Nov. 29.