The Pennsylvania Supreme Court has rejected efforts to sue the University of Pennsylvania over a doctor’s treatment of Cosmo DiNardo, who went on to murder four men in the months following his care.

While DiNardo’s family argued that University of Pennsylvania should be liable for allegedly improperly reducing the dosage of his medications, the hospital countered that the claims should be barred under the state’s “no felony conviction recovery” rule—a judicially established rule preventing convicted felons from collecting damages for circumstances resulting from their crimes.