This thesis deals with the significance of official secrecy for people-oriented police work. Frequently, administration demands more transparency and better protection for personalized data simultaneously. These two conflicting demands cause tension from which the research question for this thesis has been derived: How does official secrecy exacerbate closer participation of citizens in police work? In order to answer this question, twelve senior police officers have been interviewed as experts who frequently interact with citizens both privately and on duty. They have been asked which topics are of interest, if questions affect official secrecy, how police officers deal with this issue, which citizens are suitable for contact intensification, and how this issue affects police work. The results have been drawn from a qualitative content analysis and showed that mostly personally known individuals are chosen who are often engaged in other official institutions and/or other aid and relief organizations. This cooperation is most useful and time-efficient for police and its administration because these organizations are commonly worked hand in hand with and also understand the administrational processes. The necessary personal relationship of trust with contacts and security partners leads to the situation, on the one hand, that information is shared very deeply, and, on the other hand, that it protects from legal consequences, according to the interviewed police officers. All in all, it has been ascertained that official secrecy impedes generally intensifying the participation of citizens, particularly because it is fairly simple to make a connection between recent events or crimes and people involved on a local level. These recent matters are, in turn, of particular interest for citizens when talking to police officers. Sharing information often conflicts with the protection of data as well as official secrecy in these cases. This may result in uncomfortable conversation situations for police officers; that is why contacts with these citizens are usually avoided, and intensified sharing of information only occurs with close and trusted contacts and partners.