Western North Dakota law enforcement agencies have experienced dramatic changes in the policing landscape as a result of an oil boom. These agencies were forced to deal with a rapidly growing population that brought different cultural expectations and a substantial rise in crime. Using Klinger’s (1997) framework of formal and informal policing behaviors, the current study explores how policing styles have changed in these agencies. Researchers interviewed 101 officers from eight agencies to determine how the oil boom impacted the way they conduct their work, interact with citizens, and handle calls for service.