“The bodies of the victims were now thought to be lying at the bottom of a reservoir just east of Yosemite national park. The killers, the FBI said, were possibly connected to the Russian mafia. This was the Ralstons’ first homicide case. Until this moment, they had only used their specialised sonar system to scour the lake and riverbeds for victims of accidents or suicides. Before they agreed to help find the bodies, Gene called his cousin, a recently retired FBI agent, for advice. ‘He said the Russians weren’t really into murdering people. So we didn’t really have to worry about them doing any retaliation if we went ahead with the search.'” The Guardian: Gene and Sandy Ralston are a married couple in their 70s, who also happen to be among North America’s leading experts at searching for the dead. (Every couple needs a hobby.)