Assistant U.S. Attorney David Kessler said Greebel, 44, was Shkreli's "right hand man" in the businessman's plots to loot his fledgling pharmaceutical company, Retrophin, and secretly control its shares. According to Kessler, Greebel drafted "sham" agreements that paid Retrophin funds and stock to Shkreli's hedge fund investors, who were under the mistaken impression they were making money in his hedge funds.