▁him . ▁D erek ▁was ▁a ▁trouble d ▁Chicago ▁youth ▁head ed ▁for ▁ju ven ile ▁del in quency . ▁He ▁was ▁res cu ed ▁and ▁ment ored ▁by ▁Carl ▁B uf ord ▁( Jul ius ▁T enn on ). ▁B uf ord ▁turned ▁out ▁to ▁be ▁a ▁sexual ▁pred ator ▁who ▁mol ested ▁D erek ▁and ▁other ▁young ▁boys ; ▁he ▁was ▁eventually ▁arrested ▁for ▁murder . ▁After ▁developing ▁an ▁interest ▁in ▁football , ▁D erek ▁attended ▁North western ▁University ▁on ▁a ▁scholar ship . ▁After ▁a ▁football ▁injury ▁left ▁him ▁unable ▁to ▁play , ▁he ▁joined ▁the ▁Chicago ▁Police ▁Department ' s ▁bomb ▁squad ▁and ▁later ▁joined ▁the ▁F BI ▁and ▁the ▁B AU . ▁He ▁has ▁an ▁em otion ally ▁int imate , ▁but ▁plat onic , ▁relationship ▁with ▁technical ▁anal yst ▁Pen el ope ▁Gar cia ; ▁the ▁two ▁have ▁a ▁unique ▁sh orth and ▁and ▁ban ter . ▁In ▁the ▁season ▁ 7 ▁premi ere ▁(" It ▁T akes ▁a ▁Village "), ▁D erek ▁shows ▁utter ▁hat red ▁toward ▁Ian ▁Do yle ▁( Tim othy ▁V . ▁Mur phy ) ▁for ▁killing ▁SS A ▁Em ily ▁Pr ent iss , ▁but ▁when ▁Em ily ▁returns ▁alive , ▁he ▁has ▁mixed ▁feelings . ▁In ▁season ▁ 1 1 , ▁D erek ▁is ▁kid n apped ▁and ▁tort ured ▁by ▁the ▁father ▁of ▁Giuseppe ▁Mont olo , ▁a ▁hit man ▁whom ▁D erek ▁put ▁away ▁and ▁who ▁later ▁died ▁while ▁in ▁cust ody . ▁D erek ▁esc apes ▁and ▁when