PurposeThe current study examines the mobility patterns of gang associates in East Los Angeles using Field Investigation (FI) cards collected by police officers to document informal encounters with civilians. MethodsWe construct a typology classifying each stop in relation to a gang associate's claimed territory, residence, and the location of the stop. We then report on the distribution of mobility types and describe the individual-, event-, and gang-level characteristics commonly associated with each. ResultsOur findings suggest that there is significant variability in the mobility patterns of gang associates, and that associates often live outside their gang's turf, sometimes returning to their turf, but often spending time away from their turf. ConclusionsThese results have implications for place-based gang interventions and suggest that all gangs may not be equally suited to interventions such as civil gang injunctions.