NEW YORK (AP) — A federal appeals judge put a prosecutor on the defensive over the government’s approach to insider trading cases on Tuesday, questioning the message it sends Wall Street as it scores successes including 80 convictions over the last six years.

Judge Barrington Parker, of the 2nd U.S. Circuit Court of Appeals, questioned the government’s methods as a three-judge Manhattan panel heard oral arguments in the appeals of the December 2012 convictions of two former portfolio managers.