The family of slain journalist Steven Sotloff is suing Syria in U.S. court, claiming the government of President Bashar Assad provided support to Islamic State militants who carried out the gruesome beheading.

The lawsuit filed Monday in federal court in Washington seeks $90 million in compensatory damages plus up to three times that in punitive damages from Syria for Sotloff’s 2014 killing. It’s far from certain, however, that Sotloff’s South Florida family would be able to collect money from a foreign government if they win the case.