In which case did the court rule that using deadly force against all felony suspects is constitutionally unreasonable?

The court's ruling in this case established a significant precedent regarding the use of deadly force by law enforcement. In Tennessee v. Garner, the Supreme Court determined that police officers may not use deadly force against a fleeing suspect unless it is necessary to prevent the suspect's escape and the officer has probable cause to believe that the suspect poses a significant threat of death or serious physical injury to the officer or others. This ruling clearly indicates that not all felony suspects can be subjected to deadly force; the necessity and justification must be carefully evaluated.

This case highlighted the importance of balancing the need for effective law enforcement with the constitutional rights of citizens, particularly under the Fourth Amendment, which protects against unreasonable seizures. The Court emphasized that the unlawful use of deadly force against an unarmed and fleeing suspect—who poses no immediate threat—constitutes an unreasonable seizure and thus is a violation of the Constitution.

The other cases listed address different aspects of law enforcement practices and constitutional rights but do not specifically tackle the issue of deadly force against felony suspects in the same context as Tennessee v. Garner.