John Ertzner pleaded not guilty to threatening the students on Monday in Madison County District Court. His trial is scheduled to begin on June 9.
The students reported that a man had followed them on a campus road last month and when they stopped, they reported Ertzner pointed a gun at two of them.
Ertzner told an investigator he mistook the three for other men who'd chased him earlier in the day in Norfolk. He said he had put his BB gun on his car console but didn't point it at the students.