the lapd led kenneth olson into iding pratt. >> mr. olson was convinced by the lapd that it was elmer pratt who did the murder. and i was told at that time that mr. olson had identified i think it was at least two or three other people. >> he has now been behind bars since december 1970. he has two children growing up without him. >> i have been through countless shoot-outs in vietnam. i have been through stuff in prison. i mean, i've been through pain. but that's a pain i simply cannot describe, you know, not being there for those children. >> reporter: la 1969, three police officers and four panthers wounded in this four and a half hour shoot-out at panther headquarters. hoover declared. a vietnam war hero had become hoover's worst nightmare. >> he was clearly the target of this area. the person who had to be put behind bars for the black panther party to be stopped. and consequently they said, well, if you didn't do that who cares. we think he belongs in jail anyway. >> reporter: internal fbi reports called for him to be neutralized