Every person in the United States has the right to be free from unreasonable force when dealing with law enforcement. This right comes from the Fourth Amendment to the Constitution, which protects against unreasonable searches and seizures. When a police officer uses more force than necessary under the circumstances, that officer can be held personally liable for civil rights violations. The government that employs the officer can also be on the hook depending on the situation. Understanding how this works matters because police misconduct is one of the most common ways people experience unfair treatment by the government.

The legal tool used to sue police officers for excessive force is a federal law called Section 1983. That number refers to the section of the United States Code. It allows anyone whose constitutional rights were violated by someone acting under government authority to sue for money damages. The key idea is that the officer was acting in an official capacity, not as a private citizen. When a cop in uniform pulls you over, arrests you, or uses force during an encounter, they are acting under color of law. That is the term courts use. If they step outside what the law allows, they can be sued personally.

To win an excessive force case, you have to prove that the force used was objectively unreasonable. Courts do not look at what the officer intended or whether they were being mean. The question is whether a reasonable officer in the same situation would have used that much force. The Supreme Court made this clear in a 1989 case called Graham v. Connor. The officer’s state of mind does not matter. What matters is the facts on the ground at the moment the force was used. The severity of the crime, whether the suspect posed an immediate threat, and whether the suspect was actively resisting or trying to flee are the main factors.

This standard is difficult to meet because courts give officers a lot of leeway. They recognize that police often have to make split-second decisions in tense situations. Even if the officer made a bad call, they may be protected by qualified immunity. Qualified immunity is a legal shield that protects government officials from being sued unless they violated a clearly established right. This means you have to show that an existing court decision or law made it obvious that the officer’s specific actions were illegal. If the law was not clear enough, the case gets thrown out even if the force was excessive.

But qualified immunity is not absolute. If a court finds that the officer used force that any reasonable officer would know is illegal, the case proceeds. Recent high-profile cases have led to changes in how some states handle qualified immunity, but it remains the rule in federal courts. For example, if a cop continues to use force after a suspect is handcuffed and not resisting, that is usually a clear violation. Courts have repeatedly said officers cannot keep punching, tasing, or shooting someone who is already subdued. That is a clearly established right.

Another major issue in police liability cases is whether the government entity, not just the individual officer, can be sued. Municipalities like cities and counties can be held liable under Section 1983 if their policies or customs caused the violation. This is called Monell liability after the 1978 Supreme Court case Monell v. Department of Social Services. You cannot sue a city just because one of its officers did something wrong. You have to show that the city had an official policy that encouraged excessive force, or that it failed to train or supervise officers properly, and that failure directly led to the injury.

For example, if a police department has a pattern of ignoring citizen complaints about excessive force and never disciplines officers, that can be considered a custom. If that custom leads to a situation where an officer uses force because they know they will not face consequences, the city may be liable. Similarly, if the department does not train officers on de-escalation techniques or on when to stop using force, and that lack of training causes a violation, the city can be sued.

Proving municipal liability requires strong evidence. You need documentation of prior complaints, internal memos, training records, or testimony from other officers. It is a heavy burden but not impossible. Many successful civil rights lawsuits against police departments have been won by showing that the department had a culture of tolerance for violence.

If you win an excessive force case, the remedies are usually money damages. You can recover compensation for medical bills, pain and suffering, lost income, and in rare cases punitive damages meant to punish the officer for egregious conduct. Injunctive relief requiring the department to change its policies is also possible but harder to get.

The bottom line is that police officers have power, but that power comes with limits. When they cross the line, the law provides a way to hold them accountable. It is not an easy path, and it often requires a lawyer who knows civil rights litigation inside and out. But for people who have been injured by government employees acting beyond their authority, understanding the basics of excessive force liability is the first step toward justice.