Tulsa County Sheriff’s Office

Officer Betty Shelby, 42, entered a not guilty plea to first-degree manslaughter charges in the shooting death of Terence Crutcher, 40.

Robert Bates, 74, a wealthy insurance executive, was accused of fatally shooting Eric Harris while working with Tulsa County sheriff's deputies during an illegal gun sales sting.

Yet another unarmed black man was shot and killed by police, this time in Tulsa, Oklahoma by a 73-year-old officer of the law who said…