An unnamed teenager who alleged she was sexually assaulted at a University of Chicago frat house has filed a lawsuit, alleging the fraternity did not do enough to prevent sexual assaults, despite several other reports dating back to 2009.

The teen has accused Alpha Delta Phi and its University of Chicago chapter of multiple counts of negligence, alleging "both ignored known sexual assault risks at the house and failed to put meaningful safeguards in place," attorneys for Jane Doe said in a statement Tuesday.

The teenager says she was unable to provide consent when she was sexually assaulted on Feb. 7, according to the lawsuit.

After the alleged sexual assault by a then-member of the frat, Jane Doe was found "struggling to speak and required assistance to walk" as she left the room, according to the suit.

A University of Chicago sign is displayed on the campus in Chicago, Oct. 14, 2026.

Nam Y.…