: The killer is identified as Mark Tolson , a man in a deteriorating marriage with his estranged spouse, Bill Sievers. Tolson's father was a butcher, which provided him with the skills for the dismemberments.
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: Sometimes offers episodes via their streaming service . Guest Stars Ivan Hernandez as Mark Tolson (The UnSub). Zachary Abel as Bill Seavers. David Otunga as Dwayne Jerrard. "Criminal Minds" A Good Husband (TV Episode 2017) - IMDb : The killer is identified as Mark Tolson