In the wake of a guilty plea that sent a Marietta stockbroker and investment adviser to federal prison for five years for securities and wire fraud, a group of investors who were among those he defrauded is suing North Dakota-based brokerage house Capital Financial Investments for more than $400,000.

Sean Kelly, a broker and adviser who ran several financial entities under the “Lion’s Share” moniker in Cobb County until the Securities and Exchange Commission shut him down last October for treating his companies “as his personal piggy bank,” was accused of stealing more than $1 million from investors, many of them elderly or military veterans.