An unnamed teenager has filed a lawsuit against Alpha Delta Phi and its University of Chicago chapter, alleging negligence and a failure to implement adequate safety measures that led to her sexual assault on February 7. The lawsuit claims the fraternity ignored known risks and prior incidents dating back to 2009, creating an environment conducive to sexual violence.

Attorneys for the plaintiff, identified as Jane Doe, stated that the fraternity and its national organization were aware of potential dangers at the chapter house but failed to take meaningful action. The suit asserts that the fraternity undertook responsibility for educating members on sexual violence prevention and maintaining a safe environment, but allegedly fell short.

The teenager alleges she was unable to provide consent at the time of the assault, which occurred at a party hosted at the fraternity's residence. According to the lawsuit, a fraternity member offered her an unidentified alcoholic drink and encouraged her to consume it before the alleged incident. She was found struggling to communicate and requiring assistance after leaving the room.

The fraternity has stated that it suspended the member involved upon learning of the allegations. ABC News has reached out to the University of Chicago for comment. The accused fraternity member has not yet responded to requests for comment.

This legal action comes just days after another sexual assault allegation was reported at a different fraternity near the University of Chicago campus, highlighting ongoing concerns about safety at student social events.

The lawsuit details a history of alleged misconduct at the Alpha Delta Phi chapter house. It cites two reports of alleged sexual assault in 2009, occurring five days apart, and an anonymous social media post from 2022 alleging a similar incident at the same location.

Despite this documented history, the lawsuit claims that Alpha National did not impose interim suspensions, restrict social events, or mandate security measures like securing residential floors or stationing sober monitors at access points. The suit further alleges that the fraternity made public commitments to sexual assault prevention but failed to enforce its own policies during chapter events.

Attorneys for Jane Doe contend that the fraternity's inaction demonstrates a pattern of disregard for the safety of its members and guests. The suit seeks to hold both the local chapter and the national organization accountable for the alleged assault and the broader environment that may have enabled it, raising questions about the effectiveness of existing policies and oversight for Greek life organizations.