This book is the result of a very long, sometimes overwhelming, but eventually
very fulfilling and satisfactory period of research. Therefore, the list of
institutions and people that I am indebted to is extremely long. The study
was carried out with the financial support of the Polish National Science
Center (Narodowe Centrum Nauki) that granted me funds that allowed my
ideas and dreams to come true (research project no. 2014/ 15/ D/ HS5/ 00658
entitled “The Role of the Prosecutor in Criminal Investigation – comparative
perspective”). Three universities have welcomed me generously and
allowed me to conduct the research on their premises and provided me
with hospitality and support: The University of Bologna, the University of
Cologne, and the University of Connecticut.