Any Military trained sniper, or as many people have stated someone who has owned and practiced with a rifle could do what was done.
and regardless of whether playing games like COD( not actually mentioned seriously ), actually improves learning curve with shooting, it easily provides tactical strategy like view points , cover etc to fire from vantage points and scenario's people may never have thought about, but this isnt even a point worth talking about unless the shooter LOVES FUCKING COD.
Its the goddamn fucking USA PEOPLE.
and all this heresay and hypothesis is just that , until the analysis done by CSI groups weigh in.
Just an FYI, no one from Tribe was there, all your info is from the internet and WOLF EFFIN BLITZER( take it with a grain of salt , ESPECIALLY less than 24 hours after its happened.) There may have been only 1 shooter, maybe more.
Was there a prize announced for who GUESSES the truth?