OMAHA, Neb. (AP) — Attorneys for a former doctor accused of killing four people with ties to an Omaha medical school are searching for journals of one of the victims they believe can help exonerate their client.

That search was revealed Thursday in a hearing where defense attorneys for Anthony Garcia demanded investigators’ handwritten notes, as well as a file reportedly kept by Dr. Roger Brumback, who was killed along with his wife in May 2013.

The attorneys agreed to take a day to go over all evidence police have.

Garcia is charged with first-degree murder in the 2008 deaths of the 11-year-old son of Creighton University pathologist William Hunter and the family’s housekeeper, as well as the Brumbacks.

Authorities say Garcia’s motive was revenge for being fired from Creighton’s pathology department in 2001.