What followed instead was a sophisticated critique of policing practices in the U.S., and a set of questions that mystified him: Why do our cops seem to use their guns so often? Aren't they taught force escalation protocols, with the use of their sidearm as the last resort? After the Swiss officer came Dutch, French and German officers — all with similar critiques, similar questions, and the same professional pride in their own training and their restrained use of force.