. >> mr. olsen had been convinced that it was pratt that committed the murder. i was told that mr. olsen had identified at least two or three other people. >> reporter: pratt has two children growing up without him. >> i've been through countless shoot outs in vietnam, i've been through 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: los angeles 1969, three police officers and four panthers wounded in this 4-1/2 shoot out at panther head quarter. pratt a vietnam hero had become -- pratt was a specific target calling for pratt to be quote neutralized as a panther leader. when pratt was arrested, hoover wrote quote, the counter intelligence is to disrupt the black panther party and it's immaterial whether pratt exists to substantiate the charge. >>> in 1997 an orange county judge overturned pratt's conviction. ruling the prosecution concealed evidence that could have led to pratt's acquittal. >>> i just wanted to thank you from the bottom of my heart for your fair and courageous ruling. >> sh