Retired Nebraska couple Nick and Mary Pat Guerrier lost $500K in retirement savings to an online cryptocurrency investment scheme. Nick invested $310,000 with Starpronto Prosperity Group, an online artificial intelligence development firm using cryptocurrency, and when he could withdraw his investment with earnings, his account showed zero. The firm's website was seized by the FBI and the Douglas County Sheriff's fraud detective Mike DeChellis has investigated similar cases. The Guerriers believe their experience could save someone else's life savings. They have set up a GoFundMe to help them in retirement.