Lt. Pat Davis, spokesman for the UNM Police Department, said student Kevin Boyar confessed to having guns in his dorm during questioning Tuesday.
Boyar was released on a $900 bond paid by his mother Wednesday morning after he was arrested outside the Student Residence Center on Tuesday.
Davis said there was evidence in Boyar's room that he had brought weapons on campus.
"We recovered pictures showing the weapons in the dorm room, firearms accessories such as a laser range finder and a cleaning kit for a weapon, as well as receipts showing the recent purchase of a weapon," he said.
Boyar is charged with four counts of unlawfully carrying a firearm onto a University establishment and one count of tampering with evidence, Davis said.
Future charges for Boyar are pending further investigation, he said.
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"Anything beyond (the five charges) will be dependent on contacts on this campus or if anyone else knew anything," Davis said. "We are still investigating the case, and we want to talk to other students who have additional information."
An anonymous source told police Boyar had made threats referring to campus shootings at Virginia Tech and Northern Illinois University, Police Chief Kathy Guimond said Tuesday.
Student Miriam Kirkbride, who knew Boyar at Eldorado High School and saw him around campus, said he isn't a violent person.
"He didn't seem like he was depressed or mentally out there like the guy from Virginia Tech," Kirkbride said. "He was really nice - he got along really well. He was smart, got good grades and was very sociable. He went to parties and hung out with all the popular people."
Evidence in Boyar's case does not point to mental illness, said Harry Linneman, director of Counseling and Therapy Services.
Linneman said warning signs that an individual is mentally ill include being withdrawn and anti-social.
"The thing that is important to emphasize is the most important aspect of that is change, change from how they were before - if the person exhibits bizarre behavior or behavior that's totally uncharacteristic," he said.
Kirkbride said Boyar did not show signs of a change in behavior.
"He always seemed nice and the same guy that I knew in high school," she said.
Kirkbride said she doesn't think Boyar was planning any violence at UNM.
"I don't think Kevin's the kind of guy to attack the school or shoot the school down, even if he was bragging about it," she said. "I think it was just talk, because a lot of guys like trying to show off and be macho in front of their other friends."
