We assessed the impact of planned aggression across homicide mobility types in Newark, New Jersey, from 1997 through 2007. Homicides where offenders traveled to victims’ resident/incident locales were more likely to involve aggressive intent, whereas homicides where victims traversed to offender/incident locales were less likely to involve planned aggression. Planned aggression was unrelated to geographically proximate (internal) homicides as well as geographically distinct (total mobility) homicides. Study findings show that routine activities and situational characteristics are not only important in explaining homicide patterns but also demonstrate that planned aggression meaningfully contributes to the routine activities and environmental criminology frameworks under specific geographic conditions.