▁as ▁Chief ▁Mike ▁Dor sett ▁Jack ▁Ke ho e ▁as ▁Walter ▁Pay ne ▁Brad ▁S ull ivan ▁as ▁George ▁Del ▁Close ▁as ▁Ald erman ▁V ito ▁D ' Am b ros io ▁as ▁Bow t ie ▁Driver ▁Cl if ton ▁James ▁as ▁District ▁Att orney ▁George ▁E . ▁Q . ▁Johnson ▁( un cred ited ) ▁Don ▁Patrick ▁Har vey ▁as ▁Officer ▁Pres eus ki ▁ ▁Background ▁The ▁U nt ouch ables ▁began ▁production ▁in ▁Chicago ▁on ▁August ▁ 1 8 , ▁ 1 9 8 6 . ▁Act ual ▁historical ▁Chicago ▁locations ▁were ▁featured ▁in ▁the ▁movie . ▁ ▁De ▁N iro ' s ▁research ▁for ▁the ▁role ▁of ▁Al ▁Cap one ▁included ▁reading ▁about ▁him ▁and ▁watching ▁historical ▁foot age . ▁ ▁He ▁also ▁wanted ▁one ▁extra ▁scene ▁written ▁for ▁his ▁character , ▁and ▁time ▁to ▁finish ▁his ▁commit ment ▁to ▁the ▁Broadway ▁production ▁of ▁Cuba ▁and ▁His ▁Ted dy ▁Bear . ▁Last ly , ▁he ▁wanted ▁to ▁gain ▁about ▁ ▁to ▁play ▁Cap one ; ▁according ▁to ▁De ▁Pal ma , ▁De ▁N iro ▁was ▁" very ▁concerned ▁about ▁the ▁shape ▁of ▁his ▁face ▁for ▁the ▁part ." ▁▁ ▁A ▁month ▁after ▁the ▁film ▁was ▁released , ▁De ▁Pal ma ▁down play ed ▁his ▁own ▁role ▁on ▁the ▁film : ▁ ▁Being ▁a ▁writer ▁myself , ▁I ▁don ' t ▁like ▁to ▁take ▁credit ▁for ▁things ▁I ▁didn ' t ▁do . ▁I ▁didn ' t ▁develop ▁this ▁script . ▁David ▁[ M am et ] ▁used ▁some ▁of ▁my