brumback or dr.ewtra by that individual. >>> coming up -- a new name and new fears. >> and creighton would respond, usually dr. brumback or dr. hunter, "yeah, he was here. he was dismissed. he didn't do a good job." >> right. >> and so that kept coming back to haunt dr. garcia, that experience -- >> right. >> -- at creighton. how many times did that happen? >> i want to say at least seven or eight different times. >> reporter: to mois, professional failure and the need for revenge could be a powerful motive. now, the detective needed to know if garcia had the means to commit murder. it was the second time in five years that a doctor from creighton university's pathology department had apparently been targeted for murder. in 2008, the victims were dr. william hunter's 11-year-old son, tom and his house cleaner shirlee sherman. the latest victims were dr. roger brumback and his wife mary. and at 2:19 p.m., on the day the brumbacks were last known to be alive someone had tried to break into the home of