▁set ▁by ▁the ▁administration . ▁He ▁saw ▁it ▁as ▁his ▁duty ▁to ▁keep ▁official ▁secre ts ▁from ▁press ▁scr ut iny . ▁While ▁D CI , ▁Hel ms ▁managed ▁the ▁ag ency ▁following ▁the ▁lead ▁of ▁his ▁prede cess or ▁John ▁McC one . ▁In ▁ 1 9 7 7 , ▁as ▁a ▁result ▁of ▁earlier ▁cover t ▁operations ▁in ▁Chile , ▁he ▁became ▁the ▁only ▁D CI ▁conv icted ▁of ▁mis leading ▁Congress . ▁His ▁last ▁post ▁in ▁government ▁service ▁was ▁Amb assador ▁to ▁Iran ▁from ▁ 1 9 7 3 ▁to ▁ 1 9 7 7 . ▁Yet ▁he ▁was ▁a ▁key ▁witness ▁before ▁the ▁Senate ▁during ▁its ▁investigation ▁of ▁the ▁C IA ▁by ▁the ▁Church ▁Committee ▁in ▁the ▁mid - 1 9 7 0 s , ▁ 1 9 7 5 ▁being ▁called ▁the ▁" Year ▁of ▁Int elligence ". ▁This ▁investigation ▁was ▁ham per ed ▁sever ely ▁by ▁Hel ms ▁having ▁ordered ▁the ▁destruction ▁of ▁all ▁files ▁related ▁to ▁the ▁C IA ' s ▁mind ▁control ▁program ▁in ▁ 1 9 7 3 . ▁ ▁Early ▁career ▁Hel ms ▁began ▁his ▁career ▁in ▁intelligence ▁by ▁serving ▁in ▁the ▁war - time ▁Office ▁of ▁Str ateg ic ▁Services ▁( O SS ). ▁Following ▁the ▁al lied ▁victory ▁Hel ms ▁was ▁station ed ▁in ▁Germany , ▁serving ▁under ▁Allen ▁D ul les ▁and ▁Frank ▁Wis ner . ▁Then ▁in ▁late ▁ 1 9 4 5 ▁President ▁Tr uman ▁terminated ▁the ▁O SS . ▁Back ▁in ▁Washington , ▁Hel ms ▁continued ▁in