Motorola (NYSE: MOT) has launched another salvo in the increasingly bitter exchange between the beleaguered handset manufacturer and its ex-CFO Paul Liska, whom it terminated with cause at the end of January. In a court filing Wednesday, Motorola accused its former chief financial officer Paul Liska of destroying evidence needed for the wrongful termination lawsuit he has brought against the handset maker, reports Reuters. Motorola has asked the Cook County Circuit Court in Illinois to sanction Liska for “willful spoilation of relevant, material evidence,” alleging that Liska wiped his laptop clean of all data when he left the company in late January. When he returned his company computer to Motorola in mid-February, the handset maker called in computer forensic experts who eventually discovered that a data destruction program had been run on the laptop, destroying all user created data on it, and leaving it “virtually devoid of any usable data related to the case.”

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Both Motorola and Liska’s lawyer declined to comment on the new allegation. Cook County Circuit Court is scheduled to hear Motorola’s request for sanctions on April 29.