The U.S. Supreme Court’s decision Tuesday to dismiss a pending Fifth Amendment case came as no surprise. But the justices gave no explanation for its action, leaving the unusual demise of the case City of Hays, Kansas v. Vogt open to speculation.

At issue in the case was whether the Fifth Amendment’s protection against forced self-incrimination is violated when incriminating statements are used by prosecutors at a probable cause hearing, not at a criminal trial.