Justices, in their first religious freedom decision under Chief Justice John Roberts, moved decisively to keep the government out of a church's religious practice.
Federal drug agents should have been barred from confiscating the hoasca tea of the Brazil-based church, Roberts wrote in the decision.
The tea, which contains an illegal drug known as DMT, is considered sacred to members of O Centro Espirita Beneficiente Uniao do Vegetal, which has a blend of Christian beliefs and South American traditions. Members believe they can understand God only by drinking the tea, which is consumed twice a month at four-hour ceremonies.