“I’m ticked,” says John Prevost, the retired Midwestern high school principal who is now, abruptly and without warning, globally famous and in demand. “I didn’t want to be, but I’m so angry.” He’s sitting at the table of Denise and Rob Utter, who have invited a bunch of people from their local Catholic parish, about 45 minutes south of Chicago, to talk about their friend and John’s kid brother Bob, whom they have known for decades, over pizza. Sometimes they call him Father Bob. Occasionally