Large amounts of alcohol and numerous fire code violations, UNL says these infractions have made them decide to suspend Sigma Nu through the end of the 2014 semester.
The decision comes after a fire alarm was tripped at the fraternity's house on Sunday and authorities showed up to investigate.
"Every so often, we do have a chapter that does things that they shouldn't. And certainly that's what's happened here," Juan Franco, UNL Vice Chancellor for Student Affairs, said on Thursday.
Lincoln Fire and Rescue says they found the house in extreme disarray, deeming it unlivable for now.
"At this point, what we think was going on is they were getting ready to initiate the freshmen and some of them, on purpose, trashed the house and they were going to ask the freshmen to clean it," Franco said.
Seniors, juniors and sophomores will be able to move back in once the house is in order, but freshmen will live in dorms this semester.
Franco says the action by UNL means that the chapter will not have a formal affiliation with the university and the house won't be considered a university-approved housing unit. But students will still be able to go to class.
"We want to make sure that he house itself is safe for students to live in. But we also worry about the atmosphere and the culture in the house," Franco said.
He says the university can't monitor fraternities and sororities 24/7, so they rely on chapter leadership and house parents to monitor activities. Sigma Nu's house mom wasn't around because of the long weekend.
Franco says UNL administrators are working with the chapter's alumni and advisory board, and Sigma Nu's national office to discuss steps the fraternity needs to take to be reinstated.
UNL Police are still investigating the case, so there could be additional sanctions against Sigma Nu and against individual members.