Sentence:  Skeletor held the gun against Speedo's head, held Speedo between himself and the cops who stood, motionless and futile, where they'd stopped. Robinson, Lindfors, Carter, three <WSD>uniforms</WSD> and I watched helpless as Skeletor, dragging Speedy with him, inched out the gate, started backing down the hill. 
Meaning of the word marked with <WSD> tags:  A uniformed police officer (as opposed to a detective).