An anti-Trump sociology professor at the College of Southern Nevada shot himself on campus last month as way to protest the president, police said.

Mark J. Bird, 69, was found bloodied outside a bathroom in the Charleston campus K building with a self-inflicted gunshot wound the morning of the second day of classes August 28.

Inside the bathroom, was the .22-caliber handgun he used as well as a spent shell casing.

Bird also left a $100 bill taped to the bathroom mirror with a note that read: 'For the janitor,' according to the Review Journal.

One college employee, who was holding Bird's hand while trying to calm him in the moments after the shooting, told investigators that Bird said he wanted to protest Trump.

However, the police report did not elaborate about any specifics.

Mark J. Bird, a sociology professor at the College of Southern Nevada, shot himself in the Charleston campus K building (pictured) last month

Bird was found with a self-inflicted wound to the arm. He said he shot himself to protest the president

He was treated for his wound and later charged with possessing a dangerous weapon on school property, discharging a gun within a prohibited structure and carrying a concealed weapon without a permit.

An alert about the incident was sent to all students and faculty around 9am that morning.

CSN President Federico Zaragoza wrote in a newsletter: 'I appreciate all of the expressions of concern and interest, and I pledge to keep everyone updated should the situation change.'

Bird, for whatever reason, was not identified in the newsletter.

CSN faculty union president Robert Manis told the Review Journal: 'They never really told the students much about it except that it was resolved on the actual day of the shooting.

'When you don’t give the full details, then rumors go crazy. It’s unfortunate because it made the students and faculty very afraid and allowed rumors to proliferate.'

Bird is scheduled to appear for his initial court hearing September 17.

He is currently employed as an emeritus faculty member at the community college.