Law enforcement intelligence differs from national security intelligence, largely due to the fact that law enforcement intelligence usually deals with intelligence that is gained about domestic criminal activity from surveillance, and other techniques. National security intelligence on the other hand, is more concerned with protecting the nation from external threats such as foreign terrorists, and potential military attacks by other nations. There is potential friction between the intelligence and enforcement communities, due to the fact that intelligence protocols may cause them to restrain law enforcement activities, in order to gain more intelligence on a particular criminal element, that may be domestic or foreign. Collaboration will usually ensue between the intelligence and enforcement communities, due to the fact that the intelligence community can provide law enforcement with crucial information that can help them to be more effective and vice versa.
Historical Perspectives on the Role of Federal, State and Local Law Enforcement Agencies in the United States in Domestic Intelligence Operations Relating to National Security. Book By: Schertzing, Phillip D. Understanding Terrorism: Analysis of Sociological & Psychological Aspects. 2007, Vol. 22 Issue 1, p190-206
When attempting to merge law enforcement agencies and the use of intelligence necessary for the war on terror, a myriad of problems exists that complicate this union and collaboration between police agencies and National Intelligence Agencies. The first major issue that is highlighted is the traditional role of law enforcement agencies wherein the mission, operating code, and standards of law enforcement agencies are inherently different than intelligence agencies. Police collect information and conduct investigations for criminal prosecution in accordance with American standards of jurisprudence that is placated upon constitutional constraints in place to protect the civil liberties of American citizens. In contrast, intelligence agencies routinely circumvent rules of evidence, have been exposed for violating constitutional rights of citizens, and are placated upon the notion that civil liberties don't matter when national security is at ...
Law Enforcement and National Security Intelligence