In the spring of 1939, 47-year-old Paul Grüninger was a middle-level police official in St. Gallen, a picturesque Swiss town near the Austrian border. The son of middle-class parents who ran a local cigar shop and a mediocre student who enjoyed the soccer field more than his studies, Grüninger became an unprepossessing man of quiet conventionality. After dutifully serving time in the Swiss army in World War I, he obtained a teaching diploma, settled into a position at an elementary school, attended church on Sundays and married Alice Federer, a fellow teacher.
To please both his mother and Alice, Grüninger applied for a better-paying position in the police department, a job that involved mainly filling out reports and arranging security details for occasional visiting dignitaries. Or so it seemed.