The man suspected of killing three people during a daylight mass shooting at the University of Nevada Las Vegas on Wednesday has been identified as a professor who failed to secure a job at the school, and claimed to have solved the mystery of the Zodiac Killer.

Anthony Polito, 67, had unsuccessfully applied to a professor position at UNLV before he unleashed his deadly rampage on the Las Vegas campus just before noon, according to ABC News, citing law enforcement sources.

Polito was armed with a handgun during his massacre and was killed following a shootout with two police detectives responding to the scene, the outlet reported.

The shooting began around 11:45 a.m. on the fourth floor of Beam Hall, UNLV’s business school, near the student union building.

Police found three people dead when they arrived at the building.

A fourth person was taken to an area hospital where they are listed as being in critical but stable condition. 9 Anthony Polito was identified as the suspect in Wednesday’s mass shooting that left three people dead at the University of Nevada Las Vegas. Anthony Polito / Linkedin

Four others were hospitalized after suffering panic attacks and two officers were treated for minor injuries suffered while clearing buildings, LVMPD police said.

Politos LinkedIn account states he is a Semi-Retired University Professor based in Las Vegas and attended undergraduate at Radford University in Virginia where he graduated with a double major in Mathematics and Statistics before he earned his masters degree at Duke University and completed his Doctor of Philosophy at the University of Georgia.

He served as an associated professor for 15 and a half years at East Carolina University from Aug. 2001 to Jan. 2017. 9 Students evacuate one of the school’s buildings with their hands raised, as a police officer stands to the side with a gun drawn. via REUTERS

During that time, he also ran a personal website about his life, in which he posted a 15-page theory claiming he decoded the messages left by the Zodiac Killer who operated in Northern California in the late 1960s.

Just so you wont initially write off my solution as that of a total crackpot, let me first say that I have been a member of MENSA for 35 years, I hold a double undergraduate degree in Mathematics & Statistics (two skills closely associated with successful cryptographers) and I hold a masters degree and a doctoral degree from top-tier universities as well, Polito wrote in the introduction.

So I am not a dumb guy!

He further claimed to have solved the fate of Malaysia Airlines flight MH370 and figured out the true meaning of Leonardo DiCaprios 2010 film Inception. 9 The campus was placed on lockdown almost immediately after the shooting was reported. Police evacuated students and staff on campus floor by floor, room by room, building by building.” via REUTERS

Elsewhere on his site, Polito wrote about his love of Las Vegas.

Hard to believe, looking back, but I have had the pleasure of making more than two dozen trips to Vegas over the last 15 years, his personal profile reads.

I dont gamble that much, but there is plenty to do there, thats for sure!!

Over the years, my steel trap mind collected more information and trivia about Vegas than probably anyone in this state east of I-95 (at least). 9 A SWAT vehicle arrives at the UNLV campus after a shooting on December 06, 2023 in Las Vegas, Nevada. Getty Images

Polito also used the site to list some of his favorite things, including sites in Vegas and his favorite music.

His website says he would generally listen to Frank Sinatra, but also enjoyed Selena, Elton John and Willie Nelson.

In his favorite movie section, Polito includes Apocalypse: Now and recommends Oliver Stones conspiracy-laden JFK and Ayn Rands conservative epic The Fountainheads. 9 The shooting began around 11:45 a.m. on the fourth floor of Beam Hall, UNLV’s business school, near the student union building. ALLISON DINNER/EPA-EFE/Shutterstock

Polito writes that each of his favorite films argues a truth with powerful eloquence.

His site also lists people he credited as being the Great Minds of the Twentieth Century, including George Soros, Nikola Tesla and astronomer Carl Sagan.

In a section entitled Powerful Organizations Bent on World Domination, Polito includes the Rothchild family, the National Security Administration and even the Economics Department at the Massachusetts Institute of Technology.

The section also linked back to a website created by far-right conspiracy theorist Alex Jones. 9 People wait on the outskirts of the UNLV campus after a shooting on December 06, 2023 in Las Vegas, Nevada. Getty Images

But Polito has also received commendation for his work as a professor, writing on his LinkedIn: The greatest gifts and takeaways I possess from my many years within higher education are the many kind & positive comments students made regarding my instruction disposition toward them.

One student commented on his page, I had the chance to have Dr. Polito as my teacher for my Operations Management course that I took in fall 2013.

I was an international student from Canada at the time, and learned many new things in this course.

Dr. Polito teaches students about things that happen in the real world that we will be able to apply in our careers, the student claims. He definitely knows his course material and every new class covers interesting topics. 9 People cross Maryland Parkway as they are led off of the UNLV campus after a shooting on December 06, 2023 in Las Vegas, Nevada. Getty Images

Polito also published 109 pages of alleged positive feedback he has received from students on his site.

Polito is very organized with the prepared notes, one comment reads. He is approachable and seems very open to student concerns and ideas.

His real world experiences provide anecdotes that clarify course material. He is a definite asset to the Management Department. 9 Investigators determined the victims were not students, but instead faculty or staff at the school, which may be investigated as a potential motive into the shooting. via REUTERS

Another student reportedly wrote: Professor Polito knows what hes talking about.

He may seem to ramble on sometimes about certain things, but he keeps your attention and makes sure youre alert, which is better than having students fall asleep from boredom.

He teaches real life lessons that correlate with the book/course material, the student added. I enjoyed his class and Id recommend him to my peers.

The campus was placed on lockdown almost immediately after the shooting was reported. Police evacuated students and staff on campus floor by floor, room by room, building by building, LVMPD Sheriff Kevin McMahill said at a Wednesday evening press briefing. 9 View of halted traffic after a shooting at UNLV. ZUMAPRESS.com

An apartment in Henderson, Nevada, believed to be Polito’s home, was being searched, as law enforcement officials continued to investigate the shooting while gearing up to work overnight and into the morning hours, a law enforcement official told ABC News.

The suspect’s phone has already been retrieved and detectives are looking for any clues inside the device that could hint at any form of motivation for the killings.

Investigators determined the victims were not students, but instead faculty or staff at the school, which may be investigated as a potential motive into the shooting.