The Securities and Exchange Commission has charged another director of Rochester Community Savings Bank and his son with insider trading in the second phase of a growing investigation that has already netted one director and five associates.

The commission accused former Rochester director Robert B. Frame and his son, Duncan M. Frame, of using inside knowledge when they bought 11,000 shares of Rochester stock in the spring of 1993, before the thrift revealed that it had been in secret merger talks, according to a lawsuit filed in U.S. district court in Rochester.

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