Susan Breyer, the forewoman of the jury who had originally found him guilty, had come to believe in his innocence and was at the prison when Green was released, stating: "I, they, took 24 years of his life."
But instead of calling for help as Walker lay dying with multiple gunshot wounds to the chest, Finley scoured his house for drugs the gunmen missed.
At that time, police showed him mug shots of possible suspects in the Walker case, but Finley was unable to identify anyone.
Detectives interviewed Finley again in jail, showing him additional photographs of possible suspects, this time including Green.
The graying 56-year-old Green walked out of the California courtroom as a free man on March 20, 2008, after serving nearly 25 years in prison for a crime, which he insists he never committed.
In his March 20, 2008-acquittal the judge ruled the relationship between Walker and Green probably played a significant role in the jury's decision to convict.
He claimed in an interview that he was once a freedom marcher in Mississippi fighting for civil rights and social justice during the Martin Luther King Jr. era from 1953 to 1968.