Police arrested the founder of German investment firm K1 Group, Helmut Kiener, in connection with a fraud investigation at the firm, a local prosecutor said Thursday.European and U.S. authorities are investigating whether K1 embezzled millions of dollars from several global banks, including J.P. Morgan Chase & Co., Barclays PLC, BNP Paribas SA and Société Générale SA, the prosecutor said.arrested Helmut Kiener, the founder of the K1 hedge fund, which is suspected of bilking numerous banks, including Barclays Capital, JPMorgan Chase, BNP Paribas...