Not to be confused with the Guard Quarters.
If a guard catches any sort of misconduct (damage to the prison, evidence (Soil/Vent Cover) on the floor, etc.) with no evidence linked to an inmate, the guard will report the issue in the control room. A successful report will increase the Security Level. While a guard is going to report misconduct and increase the security level, a star icon will appear over their head. If they are knocked out in this state, they will "forget" to report the problem when they wake up, mitigating the risk of security level increase.
Control rooms contain a special desk that contains confiscated contraband items. This desk does not seem to contain all confiscated contraband - some contraband may be lost permanently rather than being sent here. This desk will always be behind a guard-only door. This door will only open if you wear a Guard Outfit or Riot Guard Outfit.
On the map, the control room is marked with a police star.