▁Arm agh ▁Brigade . ▁Green ▁was ▁forced ▁to ▁" go ▁on ▁the ▁run " ▁following ▁the ▁introduction ▁of ▁intern ment ▁in ▁August ▁ 1 9 7 1 , ▁but ▁was ▁arrested ▁and ▁intern ed ▁on ▁the ▁Ma id stone ▁prison ▁ship . ▁Green ▁was ▁afterwards ▁transferred ▁to ▁Long ▁K esh ▁intern ment ▁camp . ▁On ▁ 9 ▁September ▁ 1 9 7 3 , ▁Green ▁escaped ▁from ▁Long ▁K esh ▁dis gu ised ▁as ▁a ▁priest . ▁During ▁a ▁visit ▁with ▁his ▁brother , ▁Fr . ▁G err ard ▁Green , ▁a ▁Catholic ▁priest , ▁the ▁two ▁men ▁ex changed ▁cl othing , ▁and ▁Green ▁made ▁his ▁escape ▁und et ected ▁by ▁the ▁gu ards . ▁G err ard ▁was ▁later ▁discovered ▁tied ▁up ▁in ▁one ▁of ▁the ▁prison ' s ▁comp ounds . ▁ ▁K illing ▁ ▁Following ▁his ▁escape , ▁Green ▁lived ▁in ▁the ▁Mon ag han ▁and ▁Castle bl ay ney ▁areas . ▁An ▁Irish ▁government ▁agent , ▁Se an ▁O ' Call ag han , ▁states ▁he ▁met ▁Green ▁at ▁an ▁I RA ▁training ▁camp ▁in ▁County ▁Ker ry ▁at ▁the ▁end ▁of ▁ 1 9 7 3 . ▁During ▁the ▁I RA ▁Christmas ▁ce ase fire ▁in ▁ 1 9 7 4 , ▁Green ▁returned ▁home ▁to ▁L urg an ▁to ▁visit ▁his ▁family . ▁While ▁he ▁was ▁there ▁the ▁British ▁Army ▁arrived ▁at ▁his ▁house ▁and ▁carried ▁out ▁a ▁routine ▁check - up , ▁the ▁Green ▁family ▁being ▁prominent ▁republic ans . ▁On ▁the ▁evening ▁of ▁