The research focused on their ranking of values and their perception of their work, as well as any changes in their values and image of the ideal detective during their years of service. Also, the connection between personality characteristics and their values was examined. Data were collected from 292 detectives. The average time of service was 9 years. The instruments used in the study were Pogacnik's list of 22 individual values, a list of 33 personal features and skills important for a detective's work, and Eysenck's personality questionnaire. Data were processed by descriptive statistical methods, Pearson's correlation coefficient, one-way analysis of variance, and canonical discriminant analysis. The findings confirmed the hypothesis that detectives have a clear value hierarchy; family life and traditional values are at the top of the value hierarchy, followed by self-realization values. Findings also confirmed the hypothesis that detectives have a clear image of a professional ideal. Other hypotheses confirmed were that detectives' values change with years of service; detectives' professional ideal changes with years of service; and detectives with different personality structures perceive the professional ideal differently. There was no clear confirmation of the hypothesis that detectives with different personality structures evaluate certain values differently. 9 tables