With a trial on felony charges just weeks away, federal prosecutors and lawyers for former law firm partner Evan Greebel are ratcheting up their rhetoric over some unusual issues, including the defense lawyers' own résumés.

In one of the latest disputes, prosecutors are asking the judge to bar Greebel's attorneys at Gibson, Dunn & Crutcher from referring to themselves before a jury as former prosecutors.

“That would be an unprecedented ruling,” shot back Gibson Dunn, which is also arguing that prosecutors did not follow the U.S. Attorney's Office manual in charging Greebel.