>> and so, with prosecutorial zeal, this personal injury attorney hired private investigators to chase down rumored sightings of mark weinberger. in china. israel. and france. >> it was almost like sightings of elvis because we would get tips or leads that we'd follow up on to a blind alley. >> but it was in this remote corner of italy, not far from the swiss border, that our story takes its most intriguing turn. two years after mark weinberger slipped off that yacht in the greek islands, a mysterious american rolled into the alpine village of courmayeur, making a lasting impression with his money. courmayeur crouches in the shadow of europe's highest peak on italy's side of the border with switzerland.