▁brother ▁as ▁a ▁single ▁parent . ▁He ▁attended ▁Dun bar ▁High ▁School ▁in ▁Day ton , ▁Ohio . ▁After ▁his ▁s oph om ore ▁season , ▁Johnson ' s ▁mother ▁asked ▁former ▁NBA ▁player ▁Sed ric ▁T oney ▁to ▁ment or ▁him . ▁As ▁a ▁junior ▁in ▁ 2 0 0 8 – 0 9 , ▁he ▁aver aged ▁ 1 8 . 1 ▁points , ▁ 4 . 5 ▁reb ounds , ▁ 4 . 1 ▁ass ists ▁and ▁ 2 . 9 ▁ste als ▁per ▁game ▁as ▁he ▁earned ▁Day ton ▁City ▁League ▁Player ▁of ▁the ▁Year ▁hon ors . ▁As ▁a ▁senior ▁in ▁ 2 0 0 9 – 1 0 , ▁he ▁aver aged ▁ 1 6 . 8 ▁points , ▁ 4 . 6 ▁ass ists , ▁ 4 . 5 ▁reb ounds ▁and ▁ 2 . 5 ▁ste als ▁per ▁game ▁in ▁helping ▁lead ▁Dun bar ▁to ▁a ▁ 2 5 - 3 ▁overall ▁record . ▁He ▁subsequently ▁earned ▁Day ton ▁Daily ▁News ▁Division ▁ 2 ▁Player ▁of ▁the ▁Year ▁hon ors . ▁A ▁top ▁ 1 0 0 ▁rec ruit ▁in ▁the ▁class ▁of ▁ 2 0 1 0 , ▁Johnson ▁led ▁Dun bar ▁to ▁a ▁state ▁title ▁as ▁a ▁senior . ▁However , ▁poor ▁gr ades ▁and ▁discipl inary ▁issues , ▁including ▁an ▁attempted ▁burg l ary ▁arrest ▁as ▁a ▁junior , ▁der a iled ▁his ▁basketball ▁career ▁and ▁forced ▁him ▁to ▁pay ▁in ▁junior ▁college ▁instead ▁of ▁immediately ▁en rolling ▁in ▁a ▁NCAA ▁Division