Read Sonia Sotomayor’s Atomic Bomb of a Dissent Slamming Racial Profiling and Mass Imprisonment

The Supreme Court issued an extraordinarily disappointing 5–3 decision on Monday in Utah v. Strieff, a Fourth Amendment case about police searches. Yet the terrible ruling came with a bright spot: In a powerful and groundbreaking dissent, Justice Sonia Sotomayor lambasted the majority for its heartless and illogical rejection of Fourth Amendment freedoms, invoking the Justice Department’s Ferguson report, echoing Black Lives Matter, and even citing Ta-Nehisi Coates.

Strieff itself involves a fairly simple question of constitutional law. Typically, when police illegally stop an individual on the street without reasonable suspicion, any fruits of that stop—such as the discovery of illegal drugs—must be suppressed in court, because the stop was “unreasonable seizure” under the Fourth Amendment. Strieff gave the justices an opportunity to affirm this constitutional rule. But instead, Justice Stephen Breyer joined the court’s four conservatives to add a huge loophole to that long-established doctrine. In an opinion by Justice Clarence Thomas, the court found that if an officer illegally stops an individual then discovers an arrest warrant—even for an incredibly minor crime, like a traffic violation—the stop...