>> and ralph marcus was no stranger to insurance fraud. >> it was said that ralph marcus decided pretty early on in his life that only fools worked for a living and rather than get a job, he supported himself gambling and insurance scams. supposedly, he had burned down his own house to receive the insurance proceeds. and then another time had arranged for the theft of a car and a boat to make money off that as well. >> with no forensic evidence linking marcus to the crash, investigators had one last idea. they noticed a lot number on the oil bottle found in the trunk of nick's car. armed with a warrant, investigators searched ralph marcus' garage looking for a possible connection. and they found a brand-new quart bottle of valvoline motor oil with the same lot number.