As an ex uniformed Officer and later transferred to Detectives, I would disagree that a Detective ever considers themselves as anything but an Officer just because he is in plainclothes. Many Detectives get sent into robbery scenarios such as banks when a uniform would probably panic the gunman to start taking hostages or shooting ? They are all Cops no matter the clothes or assignment.
I stand corrected.
Too many BBC detective reruns, maybe?
Those Brits seem to be real sticklers about the difference.
And us Peace Officers are Coos without Guns, or cuffs, or anything but our eyes, ears and pen and pencil (although Inuse notes on my IPhone.) 20 years sworn duty (volunteer) here.