More than two years after U.S. Supreme Court decisions started throwing out mandatory death and life sentences for minors, judges in Washington, Illinois and dozens of other states still lack guidance on what to do with juveniles past and present convicted of murder and some other serious felonies. “Courts are uncomfortable in trying to figure out what ‘life’ means in terms of years,” said Kimberly Ambrose, senior law lecturer at the University of Washington School of Law. She represented Guadalupe Solis-Diaz at the state’s Court of Appeals, arguing against a 92-year sentence he’s serving for six counts of first-degree assault and other charges for his role in a drive-by shooting. The then 16-year-old Solis-Diaz fired into a crowd in Centralia, Wash., in 2007, though did not injure his target or anyone else. It’s not clear in Washington if those 92 years are equivalent to what the U.S. Supreme Court calls “life” sentences.