Dave Scott-Thomas was easily the most famous running coach in Canada. At one point, Megan Brown was his star recruit. But her career went off the rails. Now, almost 20 years later, she says that he groomed her for a sexual relationship beginning when she was 17 years old. Scott-Thomas no longer works for the University of Guelph, and he's been suspended from his work with Team Canada in an Olympic year. But the scandal—and who stayed silent, who did or did not investigate his behaviour and when—is tearing the small world of Canadian running apart. GUEST: Michael Doyle, Special to the Globe and Mail