Just four months after joining the Supreme Court, Samuel Alito Jr. on Monday joined the club of jurists who have been targets of Justice Antonin Scalia’s wrath.

Alito wrote Zedner v. United States for a unanimous Court on Monday, siding with a criminal defendant in a dispute over interpretation of the Speedy Trial Act. But Scalia, while joining the decision, wrote a concurrence criticizing Alito for citing the legislative history of the statute, which Scalia believes is irrelevant.