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Allserialkillerscommitmurdertosatisfytheirgrandfantasies,butthemurderersfeaturedinTheMarkofaKiller,takeitonestepfurther,committingheinousactsthatallowthemtoextendtheirfantasiesandrelivetheexcitementoftheircrimesagainandagain.Withmanykeepingpostmortemsouvenirsandperformingdistinctritualsduringeachkilling,theirsignaturetrademarksoftenprovetobetheirundoing.Thisseriesfollowsthetrailsoftheirobsession,andtakesadeepdiveintothekillers’depravedpsychestorevealtheirdarkestsecretsasinvestigatorscloseintoendthekiller’sreignofterror.
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