When you hear about a police officer using force that seems too harsh, the legal question isn’t whether the officer made a mistake. It’s whether the force was “objectively reasonable” given what the officer knew at that exact moment. That phrasing comes from a Supreme Court case called Graham v. Connor, and it’s the single most important concept in any excessive force lawsuit against the police. If you want to understand how these cases work, you have to understand what “objectively reasonable” actually means—and what it does not mean.

First, the legal foundation. Most lawsuits against police officers for using too much force are brought under a federal law called Section 1983. That law lets you sue a government official who violates your constitutional rights. In excessive force cases, the specific right at stake is the Fourth Amendment, which protects you from unreasonable searches and seizures. When a cop stops, arrests, or physically controls you, that’s a “seizure.” If the force used during that seizure is unreasonable, your Fourth Amendment rights have been violated.

But “unreasonable” is not the same as “wrong” or “harsh.” The Supreme Court made that clear in Graham v. Connor in 1989. The Court said that judges and juries must judge the officer’s actions from the perspective of a reasonable officer on the scene, not from the comfortable position of hindsight. You cannot simply look at the outcome—like a broken bone or a death—and call it excessive. You have to put yourself in the officer’s shoes at the split second they decided to use force.

So how do you decide if force was reasonable? The Court laid out three main factors. First, the severity of the crime the officer suspects you have committed. A running stop sign is not the same as an armed robbery. Second, whether you posed an immediate threat to the safety of the officer or others. This is the biggest factor—if you are reaching for a weapon, charging at the officer, or ignoring commands, that threat is real. Third, whether you were actively resisting arrest or trying to flee. Someone who is passively sitting on the ground is different from someone who is fighting or running.

These factors are not a checklist. You can check all three and still have a case where the force was excessive. But they give a framework. The key point is that the analysis is totally focused on what the officer knew and saw at the moment force was used. If the officer reasonably believed you were a threat, even if that belief later turned out to be wrong, the force may still be legal. The standard is reasonableness, not perfection.

This is where many people get confused. They think that if a cop uses force and the suspect was actually unarmed or not dangerous, then the force must be excessive. Not true. The question is whether a reasonable officer in the same situation would have believed force was needed. Cops make split-second decisions with incomplete information. The law gives them room to be wrong, as long as their mistake was reasonable.

For example, suppose someone reaches into their waistband in a dark alley after a car chase. A reasonable officer might think they are grabbing a gun. If the officer shoots, and it turns out the person was only reaching for a cell phone, that force might still be reasonable—because the officer’s fear was reasonable based on the circumstances. If, however, the person was standing still with hands up, and the officer shoots anyway, that is not reasonable.

This standard also means that the officer’s subjective intent does not matter. You cannot win an excessive force case by proving the officer was angry, racist, or wanted to hurt you. The only question is whether the force was objectively unreasonable. An officer can have bad intentions, but if the force was reasonable given the situation, the lawsuit fails. Conversely, an officer with pure intentions can still be liable if the force was unreasonable.

One more layer: Most police officers also have a defense called qualified immunity. That protects officers from being sued unless they violated a “clearly established” right—meaning a prior court case with nearly identical facts already told them that particular action was illegal. This makes many excessive force cases even harder to win, because even if the force was unreasonable, the officer might get out on qualified immunity if no earlier case said exactly that behavior was wrong.

In short, suing the police for excessive force is an uphill battle. The law does not punish cops for making honest mistakes. It only punishes them for force that no reasonable officer would have used in that moment. That is the reality of the “objectively reasonable” standard. Understanding it is the first step to understanding how these cases actually play out in court.