“…They contact their victim, whom they do not know, in the street, confine her, use restraints to neutralize her, and perform sexual acts on her that lead to the incidental tearing of her clothes (external constraint). It should be noted that confinement and the use of restraints has been reported to be associated with sexual sadism (Nitschke, Osterheider, & Mokros, 2009), and to allow the murderer to neutralize his victim (an external constraint; Sewall, Krupp, & Lalumière, 2013) and satisfy his deviant sexual fantasies (e.g., domination, possession, exertion of power, infliction of suffering, all of which are internal constraints) through a ritual involving torture (e.g., nonlethal strangulation; Hazelwood, Dietz, & Warren, 1992; Ressler et al, 1988). The victim’s physical suffering and psychological distress accentuate the SSM’s sexual arousal.…”