INDIANAPOLIS (AP) — A federal appeals court has upheld a lower court’s dismissal of a lawsuit the parents of a missing Indiana University student filed against two men who were with her the night she disappeared four years ago.

In October 2014, U.S. District Judge Tanya Walton Pratt ruled the parents of Lauren Spierer failed to present evidence showing the men had anything to do with her disappearance. The lawsuit filed by Robert and Charlene Spierer maintained Jason Rosenbaum and Corey Rossman gave their 20-year-old daughter alcohol and didn’t make sure she returned safely to her apartment.

The 7th Circuit Court of Appeals said it found no decisions under Indiana law where persons were held liable for the actions of their social peers.

There’s been no sign of the Greenburgh, New York native since her June 2011 disappearance.