During the course of a serial murder investigation, it may become necessary to call in additional resources; the FBI defines this as Resource Augmentation. Within the structure of a task force, the addition of a resource should be thought of as either long term or short term. If the task force's framework is expanded to include the new resource, then it should be permanent and not removed. For short term needs, such as setting up roadblocks or canvassing a neighborhood, additional resources should be called in on a short-term basis. The decision of whether resources are needed short or long term should be left to the lead investigator and facilitated by the administration (FBI 2008).