 Generally, the passive subjects and active resistors fall under levels 1–3 of the use of force continuum, while active aggressors fall under levels 4–6.The officers are trained to apply the proper measure of force within the continuum based on the actions and classification of the subject.The United States Supreme Court, in the case of "Graham v. Connor", 490 U.S. 386, (1989), held that when engaged in situations where the use of force is necessary to effect an arrest, or to protect an officer's life or that of another, a law enforcement officer must act as other reasonable officers would have acted in a similar, tense, rapidly evolving situation.