In Miller v. Alabama, 567 U.S. 460 (2012), the Supreme Court held that a person who commits a homicide when he or she is under 18 may not be mandatorily sentenced to life without parole; the sentencing judge must have discretion to impose a lesser punishment. In Montgomery v. Louisiana, 577 U.S. 190 (2016), the Court held that Miller applies retroactively. When Montgomery was decided, I wondered (here) whether it did more than merely address Miller’s retroactive application. Language in the case indicated that a sentence of life without parole would be constitutionally permissible for only the most the most troubling young defendants—“those whose crimes reflect permanent incorrigibility.” Id. at 209. In Jones v. Mississippi, 593 U.S. ___ (2021), decided last week, the Court made clear that the Constitution does not require a sentencer to make a separate factual finding of permanent incorrigibility before sentencing a defendant to life without parole.