An extensive background check on Nathaniel Brown would have revealed he'd lied on his job application about his criminal past.
Under Ohio State University policy, that would have nixed his hiring as a university custodian, and averted the killing on campus early Tuesday morning.
Meanwhile, two notes written by Brown before the killings and released yesterday shed little light on his state of mind.
Brown, 50, an OSU custodian since October, shot and killed his supervisor, shot and wounded another boss and then killed himself with a single bullet to his head.
The shootings of Larry Wallington, 48, and Henry Butler Jr., 60, took place at 3:30 a.m. in the OSU mechanical building where they all worked.
An autopsy confirmed that Wallington, of the North Side, had been shot repeatedly in the head and neck, Franklin County Coroner Jan Gorniak said.