According to the complaint, at least $7.5 million was invested in the purported fraudulent scheme, taking place over 18 months. As a result of the allegations, the U.S. Secret Service arrested John Michael Caruso, the founder of Zima Digital Assets, and aspiring singer Zachary Salter, who co-founded Zima. Both live lavish lifestyles prosecutors claim are evidence they did not use the investments lawfully.