Even as a child, Denise von Moos knew that she wanted to work in the field of criminal investigation. Accordingly, she chose this direction and worked for many years in a criminal investigation authority in Zurich (Specialist Investigation, Federal Department of Finance FDF, Criminal Prosecution Directorate) and acquired a broad expertise in body language, facial expressions and recognising lies during hundreds of interrogations. Denise von Moos also worked for many years as a trainer for the Federal Administration and the police. She rounded off her knowledge with in-depth additional training in the areas of methodology, rhetoric, body language, facial expressions, profiling and lie detection.