Hell's Siphon

Hell's lid blew off when Detective Nason found his old buddy, Patrolman Donigan, had been shot in the back. But doom’s worst stroke was to discover hot jewels on the copper's corpse. And when Nason triggered to clear Donigan's name, he was piloting himself toward another dishonored grave. Taken from the classic pulp fiction magazine, "Headquarters Detective," September 1936 issue.