Who was murdering people and dumping the bodies in Central Park?
That was revealed on Criminal Minds Season 13 Episode 12 as the team was called to New York to try and get into the mind of a serial killer who may be returning to killing from a grace period.
Once there, they quickly realized there could be more than one killer and had to leave no stone unturned in the investigation.
Was the killer under their nose the whole time?
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Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.