Peter and Rinette Riella Bergna were a seemingly normal and happily married couple who lived in upscale Incline Village, Nev., near Lake Tahoe, Calif. He was an antiques dealer and she had just switched careers. Once a highly paid pharmaceutical consultant, she became an international tour guide, a job that paid much less and required weeks of travel at a time. When Rinette was killed in a mysterious crash on Slide Mountain, near Reno, Peter, her husband of 11 years, became the chief suspect in what police said was a murder investigation, Susan Spencer reports for 48 Hours.