Drew Peterson's lawyers are seeking a new trial on the grounds that his old lawyer did a poor job.
Attorneys Steve Greenberg and David Pielet filed a motion Friday asking the judge to throw out Peterson's guilty verdict or grant a new trial, the Southtown Star reports.
Peterson was convicted Sept. 7 of first-degree murder in the drowning death of Kathleen Savio, his third wife. Peterson's fourth wife, Stacy Peterson, disappeared in October 2007.
Friday's motion claims Peterson's former lawyer, Joel Brodsky, made a number of errors during the trial including putting Harry Smith on the stand. Smith testified that Stacy Peterson told him that she knew how her husband killed Savio.
Brodsky left the defense team last month.