The Fourth Amendment prohibits police officers from using excessive force when arresting someone. It also prohibits police officers from unreasonable seizures.Attorney Lauren Wimmer can advise you whether you suffered excessive force and whether you have a valid legal claim. Under the Fourth Amendment to the US Constitution, the police are prohibited from conducting a search and seizure without "probable cause." Using too little force is not a constitutional violation, but may unnecessarily endanger the officer or others. 6. Excessive force, though, requires a seizure under the Fourth Amendment. Using an excessive degree of force for the circumstances violates the Fourth Amendment to the United States Constitution. C. The Convergence of the Fourth and Fourteenth Amendments. "57 Instead of setting out the circumstances in which deadly force is. Violates the Fourth Amendment.