Peter Henning, a Wayne State University law professor and former assistant U.S. Attorney, was quoted on Macomb County Prosecutor Carl Marlinga's attorneys plan to ask a federal judge today to dismiss a key piece of evidence in the case against him and two co-defendants. Marlinga is charged with conspiracy, fraud, making false statements to the Federal Election Commission and exceeding campaign contribution limits. Among the motions obtained, the one to suppress the tapes would do the most damage to the government\'s case, Peter Henning said.