Despite the importance of intimate partner violence (IPV) and homicide research to women’s health and safety, much remains unknown about risk factors for intimate partner homicide (IPH). This article presents the Arizona Intimate Partner Homicide Study, pilot research that is being conducted in one U.S. state to update and expand on risk factors for IPH. In the context of presenting this study, we summarize the literature on data collection techniques, various marginalized and under researched populations, and the importance of gathering data about the victim-offender relationship and situational IPH risk factors. Additional research is needed to update risk factors for IPH to account for changes in technology and to examine differential risk across diverse populations. Local, community based data collection strategies are likely to provide more comprehensive and nuanced insight into IPH; though, to understand risk factors among marginalized populations, it may be necessary to increase sample size through a national strategy. Although not a panacea, we present this ongoing research as a model for other states to emulate and improve upon, in the hopes of developing more comprehensive data examining risk for IPH among victims of IPV.