Online the shooter called himself Cosmo Setepenta, and more than a week before he killed three police officers Sunday in Baton Rouge, La., he told a YouTube audience he didn't want to be associated with organized groups in case something happened to him."I'm affiliated with the spirit of justice: nothing else, nothing more, nothing less," he said in the clip.Cosmo Setepentra's real name was Gavin Eugene Long, and he was from KansasCity. (Missouri) As the nation took in yet another horrific murderous rampage, public records,social media and recollections from former classmates paint a picture of a puzzling personality.He was a...