Last year's "powder puff" event at a forest preserve north of Chicago gained national attention when videotapes of the incident surfaced. Students had buckets of hair, animal entrails and other filth dumped on them. Five students ended up in the hospital.
The parents of at least two victims have sued State Farm. The attackers' parents held personal liability insurance for their children.
State Farm filed a lawsuit Wednesday in Cook County Circuit Court. The company says it should not be held liable for the students' acts.