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According to Clark County Sheriff Kevin McMahill, the shooter who targeted the University of Nevada, Las Vegas, attempted to mail at least 22 letters to various university personnel nationwide just before the shooting.

Sheriff McMahil disclosed that one letter contained a harmless white powder substance, urging caution regarding suspicious mail without a return address. The shooter, 67-year-old Anthony Polito, ultimately killed three people, including two university professors. In addition, a fourth victim, who was also a UNLV professor, remains in critical condition at a local hospital.

Sheriff McMahill stated that a list of professors from UNLV and East Carolina University, where Polito had formerly worked, was found in his possession. However, none of the faculty members on the list were victims of the attack.

In Polito’s nearby apartment, authorities discovered a document resembling a last will alongside an eviction notice on the apartment door. At the time of being killed by police, Polito was moving towards the Student Union with over 150 rounds of ammunition.

UNLV President Keith Whitfield expressed sadness revolving around the attack. He said, “Yesterday was the most difficult day in the history of our university. Words are still hard to come by as we’re only beginning to process the grief, loss, anger, and fear associated with Wednesday’s tragic campus shooting that took the lives of three of our cherished faculty members. Another faculty member remains hospitalized.”