▁the ▁I CE ▁Office ▁of ▁Investig ations ▁( O I ). ▁H SI ▁special ▁agents ▁investigate ▁the ▁largest ▁range ▁of ▁cr imes ▁and ▁have ▁the ▁stat ut ory ▁authority ▁to ▁en force ▁the ▁Im m igration ▁and ▁National ity ▁Act ▁( Title ▁ 8 ), ▁U . S . ▁custom s ▁laws ▁( Title ▁ 1 9 ), ▁general ▁federal ▁cr imes ▁( Title ▁ 1 8 ), ▁the ▁Control led ▁Sub st ances ▁Act ▁( Title ▁ 2 1 ), ▁as ▁well ▁as ▁Tit les ▁ 5 , ▁ 6 , ▁ 1 2 , ▁ 2 2 , ▁ 2 6 , ▁ 2 8 , ▁ 3 1 , ▁ 4 6 , ▁ 4 9 , ▁and ▁ 5 0 ▁of ▁the ▁U . S . ▁Code . ▁ ▁Int elligence ▁The ▁Office ▁of ▁Int elligence ▁is ▁a ▁sub component ▁of ▁H SI ▁that ▁emp lo ys ▁a ▁variety ▁of ▁special ▁agents ▁and ▁Int elligence ▁Research ▁Special ists ▁to ▁facil itate ▁H SI ' s ▁tact ical ▁and ▁strateg ic ▁intelligence ▁dem ands . ▁Collect ively , ▁these ▁intelligence ▁profession als ▁collect , ▁analyze , ▁and ▁dis sem inate ▁intelligence ▁for ▁use ▁by ▁the ▁oper ational ▁elements ▁of ▁D HS . ▁The ▁Office ▁of ▁Int elligence ▁ ▁works ▁closely ▁with ▁the ▁intelligence ▁components ▁of ▁other ▁federal , ▁state , ▁and ▁local ▁ag encies . ▁Many ▁H SI ▁field ▁offices ▁assign ▁intelligence ▁anal yst s ▁to ▁specific ▁groups , ▁such ▁as ▁financial ▁cr imes , ▁counter - pro l ifer