In the section “Rules of Conduct”, of the Denver Police Crowd Control Manual outlines the role of “Shadow Teams,” groups of undercover and/or plainclothes officers who infiltrate demonstrations to observe participants, gather intelligence, monitor “persons of interest”, and help target specific protesters for arrest.

"Releasing the Denver Police Crowd Control Manual is part of our ongoing investigation into the policing of social movements. Using open records requests and other methods, we are currently compiling reports documenting the Denver Police Department."