Were six wrongfully convicted men carrying out murders across New York?
That was revealed on Blue Bloods Season 8 Episode 22 when a series of drive-by murders kicked off around the same time the men got out of jail.
Meanwhile, Frank was forced to face up to the fact the men served up to nine years in prison for crimes they never committed.
Also, Jamie and Eddie found themselves in a life-threatening situation.
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Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.