(CNN) — As soon as Greg McDonald Jr. saw his parents, he knew he was in trouble. His father stood waiting for him with his arms folded and his brow furrowed. Beside him was Greg’s mother, her eyes red and puffy. “Quick, pretend you’re interested in me,” Greg Jr. told his friend Betsy as he steered the speedboat toward the dock at his parents’ riverfront home outside Grand Rapids, Michigan. Greg Jr. had just taken a group of friends out for a rollicking boat ride. It was late in the summer of 2001, and he was about to head off to his first year of college. In just a few weeks the 17-year-old th…