Why was the latest UnSub murdering people in backyard pools?
That was the question that plagued the team members on Criminal Minds Season 13 Episode 10 when they were called out to California to investigate a string of murders.
Once there, they were shocked to find that the killer was in plain sight, and the it was no longer a question of who, but a question of why.
Did a surprising connection from the past reveal the truth to the BAU?
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Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.