“…To aid in the selection of such variables, similar research conducted into other types of homicide was consulted (Canter & Fritzon, 2011; Ioannou, Hammond, & Simpson, 2015; Ioannou & Oostinga, 2015). Such research has included variables reflecting the perpetrators' previous offence history (Salfati, 2003), premeditation (Larkin & Canaparo, 2020), the use of weapons (Kamaluddin et al., 2017), the use of ‘overkill’ (Solarino et al., 2019) and the nature of the relationship between perpetrator and victim (Santila et al., 2003). The selection of variables was also informed by additional criminological research regarding risk factors preceding the perpetration of an offence including any history of mental health issues (Matejkowski et al., 2008), intoxication of the victim or perpetrator and/or substance abuse issues (Gerard et al., 2015).…”