Mont v. United States

Background

Jason Mont was released from federal prison in 2012 and put on five years of supervised release set to end March 6, 2017. He was arrested on state drug charges on June 1, 2016, stayed in jail through plea and sentencing, and the state court later credited roughly ten months of pretrial custody as time served on a six‑year state sentence. The federal district court then issued a warrant, revoked his supervised release, and added 42 months of federal prison time to run after the state term; the Sixth Circuit affirmed and the Supreme Court reviewed the legal question.

Reasoning

The Court asked whether pretrial detention that is later credited as time served for a new conviction counts as “imprisonment in connection with a conviction” under 18 U.S.C. §3624(e) and therefore pauses (tolls) the supervised‑release clock. The majority said yes: ordinary meanings of “imprison” can include pretrial custody, “in connection with a conviction” covers detention that is later credited, and the statute’s 30‑day rule shows courts may calculate tolling after the fact. The Court affirmed the Sixth Circuit’s judgment.

Real world impact

After this decision, pretrial jail time that a court later credits as time served will generally pause a person’s federal supervised‑release period. That allows courts to preserve and later enforce remaining supervision or add federal time consecutive to a state sentence. The decision also resolves a split among appeals courts about how to treat credited pretrial detention and leaves some uncertainty for defendants about supervision status while detained.

Dissents or concurrances

Justice Sotomayor’s dissent argued the statute uses the present tense—“is imprisoned”—so it does not reach pretrial detention before any conviction, and she urged reliance on existing tools (like issuing a summons or warrant) to preserve a court’s authority.