Attention, personnalités dangereuses (DEVELOPPEMENT P)

The book offers practical advice grounded in law enforcement techniques. I'm curious what motivated the author to make this approach accessible to the general public.

Some profiles felt surprisingly accurate but also made me wonder how easy it is to misjudge someone. Has anyone had personal experiences with these traits that changed their perspective?

The book emphasizes certain behaviors as especially dangerous. I'm interested in what criteria or experiences led to these choices — was it based on case studies or personal expertise?