The Supreme Court stated that, "The test for reasonableness under the Fourth Amendment is not capable of precise definition or mechanical application. This chapter focuses on the degree of force an officer may use.In general, a seizure of a person is unreasonable under the Fourth Amendment if a police officer uses excessive force in making a lawful arrest. In this detailed guide, we'll break down each element of a Section 1983 claim, explore the steps to file a lawsuit and examine common challenges you may face. Amendment analysis in pre-arrest excessive force claims. No Qualified Immunity for Sheriff's Officers; Question Of Fact Whether Fourth Amendment Violation. All searches and seizures under the Fourth Amendment must be reasonable and no excessive force shall be used. Lawfulness of a use of force under the Fourth Amendment to the U.S. Constitution. Connor established the modern constitutional landscape for police excessive force claims. The Buckeyes and Longhorns meet in the Cotton Bowl on Friday.