When you think of Los Angeles District Attorney George Gascón’s landslide loss on Tuesday, you should hear the sound of a sad fluegelhorn. Only L.A.’s criminals will be sorry to see him go. Mr. Gascón’s staff rebelled, crime spiked, and the public mood soured. Within three months he faced a recall backed by his own prosecutors and victims’ rights groups. That effort failed, as did a subsequent recall, due to a lack of qualifying signatures. But then he drew the line on that sort of compassion: “Our system of justice can’t continue to rely on policies that create more victims...