Piotr Chomczyński, Ph.D., an associate professor at the University of Lodz and team leader in Centre for Data Analysis, Modelling and Computational Sciences (CAMiNO) - a scholarship holder of the European Eurica program at the Instituto de Investigaciones Sociales at the Universidad Nacional Autónoma de México, where he conducted ethnographic research on organized crime. Working for the Comisión de Derechos Humanos in Mexico, he monitored the situation of detainees and correctional facilities in Mexico. Ministerial Scholarship Holder for Young Eminent Scientists, winner of the scientific awards of the Polish Academy of Sciences, and the Rector of the University of Lodz. Manager and member of a team of numerous domestic and foreign research projects (United States, Ecuador, Germany, Spain, Norway, Sweden, Portugal, Ukraine, Mexico). Currently working on the project Crime in Latin America (CRIMLA): The role of family, employment , culture and the state" will look for answers to these questions. The project is funded by a grant from the Norwegian Research Council. He conducted classes in the sociology of deviance at Pennsylvania State University in the United States and classes in qualitative research methodology for Ph.D. students at Universidad Nacional Autónoma de México. He is a graduate of courses in Scientific Writing at Stanford University and others at the Foundation for Polish Science. Graduate of postgraduate studies in the field of "Knowledge Commercialization (R & D)" completed with the PRINCE 2. Member of editorial committees and reviewer of Polish and foreign journals and author of numerous foreign and domestic scientific publications (Oxford University, Sage, Taylor & Francis, Elsevier, Edward Elgar Publishing) reports and expert opinions financed from the EU ESF budgets, the Ministry of Justice, the Ministry of Family, Labor and Social Policy and local administration. He specializes in qualitative methods of sociological research on deviance, adult and juvenile crime, domestic violence and drug organized crime. His scientific interests concern ethnography of Mexican drug trafficking organization. Piotr Chomczyński is a founder of a new concept in criminology: Collective Trajectory published in the following journals: The British Journal of Criminology, Justice Quarterly, Journal of Contemporary Ethnography, Global Crime, Journal of Drug Issues