Since his message is that women can be violent also, I'll be assuming that Sue will find him "not credible" as well).
Several studies, including large and nationally representative samples, have found that female-only violence is as prevalent as or more prevalent than male-only violence, and that the most prevalent pattern is mutual violence. The 1975 and the 1985 National Family Violence Surveys both found that about half of the violence was mutual, one quarter was male-only, and ne quarter was female-only (Gelles & Straus, 1988; Straus, Gelles, & Steinmetz, 1980). The National Comorbidity Study (Kessler, Molnar, Feurer et al., 2001) found similar percentages. Other studies showing similar results include (Anderson, 2002; Capaldi & Owen, 2001; McCarroll, Ursano, Fan et al., 2004; Moffitt, Caspi, Rutter et al., 2001; Williams & Frieze, 2005). In all of these studies, the predominant pattern was mutual violence.
Not a Dutton to be found.