What others have you heard? I'm wondering how high the numbers go. Could it be sections of their jurisdiction? Like maybe D-6 means district 6? Or have you heard something high like D-82 before as well?
they are disposition codes, d-1 through d-10 is as high as i have heard. Boils down to how the call was handled in the end. AOR advised of rights, utl unable to locate etc etc