Terrorist activities require many of the same investigative techniques as organized crime. The investigator may be involved in the identification of all coconspirators, aiders, and abetters; the pursuit of unapprehended parties; the investigation of arrestees and their potential for cooperation; the obtaining of additional information on suspects; and determining the location of terrorists and hostages. Regarding intelligence activity, efforts should focus on gathering information for long-term study and information helpful in predicting immediate, forthcoming terrorist incidents. Social network analysis is a technique used to show and clarify relationships between individuals and their functioning within a group. The crime scene investigation enables lab technicians to identify explosive residue, components, and accelerants; affords the opportunity for ballistic comparison; and allows investigators to re-enact the crime so that methods of approach, commission, and escape are identified. The investigation's success and the investigator's safety depend on effective searches in the following situations: crime scenes, bomb plants, raids on safehouses and compounds, arrestees' persons and personal effects, vehicles, and buildings. 2 figures, 4 notes, and 9 references.