Yavapai County prosecutors are defending an FBI agent who testified against Attorney General Tom Horne in a civil campaign finance case from perjury allegations raised by Horne's lawyers.

Horne lawyers say FBI agent Brian Grehoski lied on the stand and want a judge to throw out his testimony.

But prosecutors said in a Friday court filing that at most the FBI agent may have mischaracterized an exchange with a witness on a minor side issue that doesn't warrant throwing out the testimony.

Horne and aide Kathleen Winn are accused of illegal communications about a purportedly independent campaign backing Horne's 2010 election campaign.

Both contend they were talking on the phone about a real estate transaction, not an ad planned by the group headed by Winn to target Horne's election opponent.