Motivation to Kill: The Relationship between Motive and Weapon Choice in Homicide

The purpose of this study is to examine the factors that influence the choice of weapon in homicide. The study focuses on three research questions using data from Newark, New Jersey: what is the most commonly associated weapon with each motive? What factors influence the use of a particular type of weapon in a homicide? How does the method of weapon retrieval, or lack thereof, affect the choice of weapon? The cross-tabulation findings revealed that domestically-motivated homicides are most likely to be committed with knives and blunt objects; and drug-, gang-, dispute-, revenge, and robbery-motivated homicides were most likely to be committed using a firearm. The logistic regression demonstrated the method of weapon retrieval, the mode of how the homicide was carried out, the offender’s gender, and the victim and/or offender being a drug dealer or a gang member were all significant in terms of how they affected the offender’s use of a firearm to carry out the homicide. For knives and blunt objects, the method of weapon retrieval, the mode of how the homicide was carried out, the offender’s gender, and the victim and/or offender being a drug dealer or a gang member were all significant in terms of how they affected the offender’s use of a knife or blunt object to carry out the homicide. The results support the need for focused deterrence and conflict resolution interventions.