▁state ▁and ▁assass inate ▁the ▁president . ▁Burn ett ▁ple aded ▁guilty ▁to ▁less er ▁m ans la ugh ter ▁and ▁gang ▁charges ▁in ▁the ▁December ▁ 2 0 1 1 ▁sl ay ings ▁of ▁former ▁soldier ▁Michael ▁Ro ark ▁and ▁his ▁girl friend ▁T iff any ▁York , ▁who ▁were ▁killed ▁because ▁they ▁knew ▁of ▁the ▁group ’ s ▁plans . ▁Pro sec utors ▁sought ▁the ▁death ▁penalty , ▁but ▁in ▁May ▁ 2 0 1 4 ▁P eden ▁was ▁given ▁a ▁life ▁sentence ▁that ▁included ▁the ▁possibility ▁of ▁par ole ▁after ▁serving ▁at ▁least ▁ 3 0 ▁years . ▁Agu ig ui ▁and ▁Sal mon ▁also ▁struck ▁ple a ▁de als ▁to ▁avoid ▁a ▁possible ▁death ▁sentence ▁and ▁both ▁were ▁sent enced ▁to ▁life ▁in ▁prison ▁without ▁par ole . ▁ ▁Th re ats ▁made ▁by ▁Den ver ▁man ▁In ▁October ▁ 2 0 1 2 ▁Mitchell ▁K us ick ▁was ▁arrested ▁by ▁the ▁U . S . ▁Secret ▁Service ▁at ▁his ▁parents ' ▁sub urban ▁Den ver ▁home ▁after ▁his ▁mental ▁health ▁ther ap ist ▁told ▁police ▁that ▁K us ick ▁wanted ▁to ▁kill ▁the ▁president ▁and ▁had ▁been ▁trying ▁to ▁keep ▁track ▁of ▁his ▁vis its ▁to ▁the ▁Den ver ▁area . ▁Ass istant ▁U . S . ▁Att orney ▁Richard ▁H os ley ▁stated ▁that ▁the ▁Secret ▁Service ▁arrested ▁him ▁because ▁" they ▁were ▁concerned ▁for ▁the ▁community ' s ▁safety ". ▁" It ' s ▁clear ▁to ▁the ▁court ▁that ▁the ▁def endant ▁has ▁a ▁severe ▁mental