Final answer:
In the case of Tennessee v Garner, the Supreme Court ruled that law enforcement should issue a warning, when feasible, before using deadly force. This was to ensure both effective law enforcement and the protection of suspects' constitutional rights.
Step-by-step explanation:
The Supreme Court case Tennessee v Garner ruled that, when feasible, a warning should precede the use of deadly force by law enforcement. This landmark decision addressed the constitutionality of using deadly force against an unarmed fleeing suspect. By adding this requirement, the Court aimed to balance the interests of crime prevention and suspects' rights to due process under the Fourth Amendment, which prohibits unreasonable seizures.