Final answer:
In Tennessee v. Garner, the Supreme Court ruled that the use of deadly force against non-dangerous fleeing suspects is unconstitutional unless there's probable cause of a significant threat.
Step-by-step explanation:
The Court's ruling on the use of force in the Tennessee v. Garner case of 1985 established that the use of deadly force against an unarmed and non-dangerous fleeing suspect is an unreasonable seizure under the Fourth Amendment. In this case, the Supreme Court held that law enforcement officers can only use deadly force to prevent escape if 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 significantly limited the circumstances under which police could use deadly force and represented an important precedent regarding police procedures and civil rights.