The disgruntled professor who shot four educators at the University of Nevada, Las Vegas - killing three - had taken a powerful erectile dysfunction drug before going on his rampage.
Anthony Polito, 67, opened fire on the fourth floor of the Lee Business School at 11.45am on December 6, killing Professors Patricia Navarro Valez, 39; Cha Jan 'Jerry' Chang, 64; and Naomo Takemoru, 69, and critically injuring a fourth.
He then died in a shootout with police who rushed to the scene.
An ensuing autopsy report has since revealed that Polito had tadalafil - the scientific name for 시알리스구매사이트 Cialis - in his bloodstream, the Las Vegas Review-Journal reports.
Polito's bloodstream tested positive for 84 nanograms per milliliter of the erectile dysfunction drug - which can last up to 36 hours in the body, according to the autopsy report on June 15.