Tyson Timbs wants his Land Rover back, but he needs the Supreme Court’s help.

If the high court takes up the forfeiture fight—styled Tyson Timbs and a 2012 Land Rover LR2 v. Indiana—it can resolve “an unsettled question of national importance” that affects millions of people, as Timbs frames the stakes in his Jan. 31 petition.

He lost the luxury SUV after Indiana police officers seized it for its alleged use in drug crimes. The state’s top court condoned the forfeiture, joining a “growing minority” of states to say the Eighth Amendment’s ban on excessive fines doesn’t apply...