Justice Society of America: 1979: Swift Retribution
by Immortalwildcat 
After Mister Terrific was murdered on the JLA Satellite during a meeting of the JSA and JLA, his killer — an old foe called the Spirit King — escaped back to Earth-Two. But how will the JSA track down the killer of one of their own when he can possess any body he wishes? And will they be able to stop him before he destroys Terry Sloane’s family?