▁second ▁series ▁he ▁has ▁played ▁the ▁role ▁alone . ▁ ▁In ▁series ▁ 3 , ▁Carl ▁briefly ▁worked ▁for ▁the ▁Mag u ires ▁by ▁growing ▁mar iju ana ▁for ▁them ▁in ▁his ▁lo ft , ▁until ▁the ▁police ▁found ▁out ▁about ▁the ▁production . ▁Carl ▁was ▁briefly ▁taken ▁into ▁cust ody , ▁and ▁gave ▁a ▁statement ▁that ▁the ▁mar iju ana ▁was ▁grown ▁for ▁the ▁household ' s ▁own ▁personal ▁use . ▁But ▁after ▁a ▁tip ▁was ▁given ▁to ▁the ▁police ▁about ▁M andy ▁Mag u ire ▁( Sam anth a ▁S idd all ) ▁s elling ▁we ed , ▁her ▁mother ▁M imi ▁Mag u ire ▁( T ina ▁Mal one ) ▁sus pected ▁that ▁Carl ▁bet rayed ▁them ▁and ▁sent ▁her ▁sons , ▁Don ny ▁( C ly ve ▁Bon elle ) ▁and ▁Sh ane ▁Mag u ire ▁( N icky ▁Evans ), ▁after ▁him . ▁Later , ▁Carl ' s ▁sib lings ▁Lip , ▁Ian ▁and ▁Deb bie , ▁figured ▁out ▁that ▁the ▁only ▁person ▁with ▁the ▁mot ive ▁for ▁inform ing ▁the ▁police ▁about ▁M andy ' s ▁deal ings ▁was ▁in ▁fact ▁her ▁brother ▁Sh ane , ▁who ▁was ▁angry ▁that ▁his ▁mother ▁chose ▁his ▁sister ▁over ▁him ▁to ▁over see ▁that ▁area ▁of ▁the ▁family ▁business . ▁After ▁Lip ▁confront ed ▁Sh ane ▁over ▁the ▁matter , ▁Sh ane ▁agreed ▁to ▁call ▁off ▁the ▁family ▁h unt ▁for ▁Carl . ▁ ▁Carl ▁develop s ▁a ▁long ▁t ally ▁of ▁sexual ▁con quest s ▁in ▁the ▁later ▁series