John Gardner was a Marine before becoming a Lantern; Marines are either sociopaths or arsekicker law enforcers. (Rather oddly, the same is true of Lanterns - of every color - and yes; I am, surprisingly, including the Star Sapphires - and Carol Ferris. If anything, it is more true of Agapo and Fatality-1 than even Carol; ask (of all people) Sinestro - and he WOULD know.)