. >> reporter: don trager said he only spoke to the home's origin owner in passing. now, like most people, he wonders why lew would report his car stolen in 1992, fill it with several bags of cement, and bury it behind his new 12,600-square foot home. >> i think it's crazy. it's like, how could you have a place like this, property values so high, and you're scamming like, i don't know, $8,000 car? it just doesn't make any sense. >> reporter: trager had no idea that lew once told investigators that he was involved in organized crime or that he was arrested for the murder of his girlfriend in the 1960s and convicted of attempted murder of another person in 1997, or about the numerous other run-ins with law, including insurance fraud in the 1990s, involving a plot to sink his own yacht by the golden gate bridge and collect the insurance money. however, it was lew's professed ties to organized crime that really had neighbors curious, especially after cadaver dogs alerted handlers to areas near the dig site. >> they could be reacting to blood, they could be reacting to ol