1 9 9 2 . ▁During ▁his ▁ten ure ▁in ▁the ▁military , ▁he ▁was ▁part ▁of ▁the ▁Gru po ▁Aer om ó vil ▁de ▁F uer zas ▁Es pe cial es ▁( G AF E ), ▁an ▁el ite ▁special ▁forces ▁unit ▁of ▁the ▁Army , ▁where ▁he ▁received ▁top ▁military ▁training . ▁On ▁ 1 ▁May ▁ 1 9 9 9 , ▁however , ▁he ▁applied ▁to ▁be ▁dis charg ed ▁from ▁the ▁Army . ▁Short ly ▁there after , ▁he ▁was ▁rec ru ited ▁by ▁the ▁G ulf ▁Cart el , ▁a ▁Mexican ▁drug ▁tra ff ick ing ▁organization , ▁and ▁began ▁working ▁for ▁the ▁drug ▁king pin ▁Os iel ▁C ár den as ▁Gu ill én ▁along ▁with ▁several ▁other ▁ex - command os ▁from ▁the ▁Army . ▁ ▁The ▁group ▁of ▁former ▁soldiers ▁rec ru ited ▁by ▁the ▁G ulf ▁Cart el ▁became ▁known ▁as ▁Los ▁Z et as , ▁and ▁M ell ado ▁Cruz ▁was ▁part ▁of ▁the ▁original ▁four teen ▁found ers ▁of ▁the ▁group . ▁The ▁group ' s ▁members ▁were ▁Art uro ▁Gu zm án ▁Dec ena ▁( alias ▁" Z - 1 "), ▁the ▁leader ; ▁Ale j andro ▁Lu cio ▁Mor ales ▁Bet anc ourt ▁( alias ▁" Z - 2 "); ▁Her i berto ▁Laz cano ▁Laz cano ▁( alias ▁" El ▁Laz ca "), ▁Mate o ▁Dí az ▁López ▁( alias ▁" Z - 6 "); ▁Jes ús ▁En rique ▁Re j ón ▁Agu ilar ▁( alias ▁" El ▁Mam