In an almost perfect crime four unnamed criminals pumped Tranq gas into the Luna-1 oxygen supply causing virtually all Luna-1 citizens to fall asleep instantly. While traffic crashed to a halt, fires burned unchecked and people toppled to their deaths the criminals robbed people and businesses alike.
They would have got away without trace but for a small twist of fate. All four were found suffocated with their loot after they neglected to pay their oxygen bill.
Dredd was heard to say “It sure pays to keep your gas bills up to date.”
Story: The Oxygen Board
Appears: 2000AD Prog 57
Writers: John Wagner
Art: Brian Bolland
Dated: 25 March 1978
This is a classic example of Dredd. A major threat to the city (albeit Luna-1), a solid sci-fi edge and the criminals undone by their own action. And Bolland art to provide the cherry on the cake.