Illinois state law allows family members of people who overdose to sue anyone within a given geographic area who sold or distributed the same kind of drug. Illinois Supreme Court: It violates due process for a plaintiff to recover a lot of money from a person who had no connection at all to the drug user. Dissent: Although the law “pushes the boundary of civil liability by dispensing with traditional notions of causation,” we’re meant to be more deferential to the legislature under the rational basis test.