OMAHA, Neb. (AP) — A former doctor charged with killing four people with ties to an Omaha medical school in separate attacks in 2008 and 2013 is seeking separate trials for the killings.

Attorneys for Anthony Garcia will ask a Douglas County District judge on Monday to order separate trials in the March 2008 slayings of Dr. William Hunter’s 11-year-old son and the family’s housekeeper and the May 2013 killings of Dr. Roger Brumback and his wife, Mary.

Defense attorneys Bob and Alison Motta of Chicago argue that trying the cases together could unfairly sway jurors.

But a major piece of prosecutors’ case is that Garcia was motivated by revenge for being fired from Creighton’s pathology department in 2001 by Roger Brumback and William Hunter.