Claudia Barker, then 15 and a high school junior, was on an overnight trip with her Mount Carmel Academy debate team in November 1973 when her coach and history teacher told her to come by his hotel room after curfew.

That night was the first time Barker and Robert Dupont, a charismatic educator who was a favorite among students, kissed. But it didn’t stop there, Barker recounted recently.