Which court case established the concept of objective reasonableness for use of force?

The concept of objective reasonableness for the use of force was established in the case of Graham v. Conner. In this landmark decision, the Supreme Court set forth a standard for evaluating claims of excessive force by law enforcement. The ruling emphasized that the evaluation of an officer's use of force should be based on how a reasonable officer would act under similar circumstances, rather than on the subjective perceptions of the officer involved. This framework is crucial for assessing the legality of an officer's actions during confrontations, allowing for a standard that takes into account the rapidly evolving and often dangerous situations that officers face.

The ruling helps to balance the need for effective law enforcement with the protection of individuals' constitutional rights. This case serves as a foundational principle for various legal standards applied in evaluating law enforcement conduct across the United States today.