7.06 Fourth Amendment: Terry (Investigative) Stop is a legal precedent established by the United States Supreme Court that provides the grounds for an officer to stop a person temporarily and frisk them for weapons, without necessarily having probable cause to make an arrest. This type of stop is sometimes referred to as a “stop and frisk”. Generally, a Terry Stop requires the officer to have reasonable suspicion that the person is engaged in criminal activity and that the person may be armed. The purpose of the stop is to allow the officer to protect himself or herself from possible danger and to further investigate the situation. There are two types of Terry stops: investigatory stops and protective stops. An investigatory stop is made when the officer has reasonable suspicion that the person has committed a crime, or is about to commit a crime. A protective stop, also known as a frisk, is made when the officer has reasonable suspicion that the person is armed and dangerous.