“…Although there is evidence of severe female criminality and offending careers (Collins, 2010;Fitzgerald et al, in press;Gunnison & McCartan, 2005;Kjelsberg & Friestad, 2009), it is dwarfed by that of males. Prior research has indicated a sex ratio of 12:1 (Soothill, Ackerley, & Francis, 2003), 12:1 (Van De Rakt, Nieuwbeerta, & De Graaf, 2008, 10:1 (Block et al, 2010), 9:1 (DeLisi, 2002 in terms of the ratio of male to female career offenders, and the modal research study uses male-only samples when studying the extremes of violent offending (e.g., Dobash et al, 2007;Lussier, Tzoumakis, Cale, & Amirault, 2010;Smallbone & Wortley, 2004).…”