When a police officer kills someone, several investigations and legal processes open at the same time, and they run on separate tracks. There is an immediate investigation at the scene, a prosecutor’s decision about criminal charges, a possible federal civil rights case, a civil lawsuit by the family, an internal review inside the officer’s department, and sometimes a broader federal investigation of the agency itself. Each track has its own rules, its own burden of proof, and its own timeline. Outcomes on one do not control the others. An officer can be cleared criminally and still lose a civil lawsuit. An officer can be acquitted in state court and still face federal charges for the same killing.
What Happens at the Scene
The first hours look like any other death investigation, with some additions. Investigators collect the officer’s weapon, photograph the area, recover physical evidence, and secure available video, including body-worn camera footage and nearby surveillance. Witnesses are identified and interviewed separately. The officer who used force is isolated from other officers before giving a formal statement, so that accounts are not shaped by what colleagues saw or said.
Most jurisdictions run two investigations in parallel. The officer’s own department conducts an internal review focused on whether policies were followed. A separate outside agency, often a state bureau of investigation or a neighboring jurisdiction’s homicide unit, handles the criminal investigation. The outside track exists to avoid the obvious problem of a department investigating its own officers.
Body-worn camera footage, when it exists, is often the single most important piece of evidence. Rules on whether and when it becomes public vary by state.
The Legal Standard That Governs Everything
Two Supreme Court decisions set the frame that every later decision maker applies.
Tennessee v. Garner (1985) addressed shooting a fleeing suspect. The Court held that deadly force against someone running away is only constitutional when the officer has probable cause to believe the suspect poses a serious threat of death or physical injury to the officer or others. Shooting an unarmed, nondangerous person simply to prevent escape is unconstitutional, regardless of what state law might allow.1Justia U.S. Supreme Court Center. Tennessee v. Garner, 471 U.S. 1 (1985)
Graham v. Connor (1989) established the broader “objective reasonableness” standard for excessive force claims under the Fourth Amendment. An officer’s actions are judged from the perspective of a reasonable officer facing the same situation at that moment, not with the benefit of hindsight. Courts weigh the seriousness of the suspected crime, whether the person posed an immediate threat, and whether they were resisting or trying to flee.2Justia U.S. Supreme Court Center. Graham v. Connor, 490 U.S. 386 (1989)
The officer’s personal motivations are irrelevant under this test. An officer who acted out of genuine fear and an officer who acted out of spite are measured by the same yardstick: whether the actions taken were objectively reasonable given what the officer knew at the time.2Justia U.S. Supreme Court Center. Graham v. Connor, 490 U.S. 386 (1989)
Whether the Officer Gets Charged
Once the outside investigation ends, the file goes to a prosecutor. The prosecutor’s job is to decide whether a crime was committed, measured against that reasonableness standard. Most cases end here, with no charges. Prosecutors must believe they can prove guilt beyond a reasonable doubt, and the reasonableness framework gives officers substantial latitude.
In some jurisdictions, the prosecutor presents the evidence to a grand jury rather than making the call alone. A grand jury is a group of citizens who review evidence in private and decide whether to issue an indictment, the formal accusation that opens a criminal case. These proceedings are one-sided by design. Only the prosecution presents evidence, and the sessions are secret.
There is an inherent tension in all of this. Prosecutors work alongside police every day, depend on them for other cases, and often share close professional ties. That dynamic is why a growing number of jurisdictions require an independent or special prosecutor when an officer kills someone. Some states mandate it by law. Others leave it to the local district attorney or attorney general.
If There Is a State Trial
If the prosecutor files charges, the case proceeds like any other criminal trial, with one critical difference: the jury evaluates the officer’s conduct through the Graham framework. Common charges range from manslaughter to murder, depending on the circumstances. The prosecution carries the full burden of proving each element beyond a reasonable doubt.
Acquittals are far more common than convictions, in part because the objective reasonableness standard is built to account for the chaos of real encounters. A conviction can mean prison. The sentence depends on the specific charges and the jurisdiction’s sentencing guidelines. Even a conviction on lesser charges like negligent homicide can end a career and result in years behind bars.
Federal Civil Rights Charges
An acquittal or a decision not to prosecute at the state level is not necessarily the end. The federal government can bring its own criminal charges under 18 U.S.C. § 242, which makes it a crime for anyone acting under government authority to willfully deprive a person of their constitutional rights. When death results, the penalty can be a fine, any term of imprisonment up to life, or both.3Office of the Law Revision Counsel. 18 U.S. Code 242 – Deprivation of Rights Under Color of Law
This does not violate the constitutional protection against being tried twice for the same crime. The Supreme Court reaffirmed in Gamble v. United States (2019) that the federal government and a state are separate sovereigns, so a prosecution by each for the same conduct counts as two different offenses.4Supreme Court of the United States. Gamble v. United States, 587 U.S. ___ (2019)
Federal civil rights prosecutions are rare and harder to win than state cases. The government must prove the officer acted “willfully,” meaning the officer knew what they were doing was wrong and chose to do it anyway. Recklessness or poor judgment is not enough. These cases are typically brought only when the evidence of intentional misconduct is strong, or when the state prosecution was plainly inadequate.
The Family’s Civil Lawsuit
Criminal charges and civil lawsuits operate independently. A family can sue regardless of whether the officer faces criminal prosecution, and regardless of the criminal outcome. Two types of civil claims dominate.
The first is a federal civil rights lawsuit under 42 U.S.C. § 1983, which lets anyone whose constitutional rights were violated by a government actor sue for damages.5Office of the Law Revision Counsel. 42 USC 1983 Civil Action for Deprivation of Rights The family can sue the individual officer and often the city or county as well. Under Monell v. Department of Social Services (1978), a municipality is liable under Section 1983 when the constitutional violation resulted from an official policy or a widespread custom, not simply because it employed the officer.
The second is a state wrongful death claim, which compensates the family for their losses: lost income the deceased would have earned, funeral expenses, loss of companionship, and similar harm. The burden of proof in civil cases is “preponderance of the evidence,” meaning the family only needs to show it is more likely than not that their claims are true. That lower bar explains why families sometimes win civil judgments even after criminal acquittals.
Deadlines Can Kill a Case Before It Starts
Section 1983 does not set its own filing deadline. Federal courts borrow the relevant state’s personal injury statute of limitations, which varies by state. Wrongful death deadlines also differ, with most falling in the one-to-three-year range. Here is where families get tripped up: claims against government entities often require a formal administrative notice well before any lawsuit can be filed, and the window for that notice can be as short as six months in some states. Missing the notice deadline can end the claim entirely, even if the statute of limitations for the lawsuit itself has not expired. Any family in this situation needs a lawyer immediately, not eventually.
The Qualified Immunity Problem
Even a strong civil case faces a powerful obstacle. Qualified immunity is a judge-made doctrine that shields government officials from personal liability unless they violated a right that was “clearly established” at the time of their conduct. It has become the primary defense in nearly every Section 1983 lawsuit against a police officer.
In practice, “clearly established” has come to mean something very specific. Courts generally require the family to point to a prior case with nearly identical facts where a court already ruled the same type of conduct unconstitutional. If no prior case matches closely enough, the officer gets immunity, even if what they did was unreasonable. Qualified immunity does not protect the municipality. A city or county sued under Monell for an unconstitutional policy cannot invoke it. That is one reason large settlements and jury awards in these cases are typically paid by the city rather than the officer personally.
What the Department Does Internally
Alongside everything happening in courts, the officer faces an internal review by their own department. This track is separate from the criminal and civil systems and applies its own rules.
The first step is almost always paid administrative leave. This is standard practice nationwide and is typically required by union contracts or departmental policy. It is not a punishment. It removes the officer from duty while investigations proceed. How long it lasts depends on the department and the complexity of the case.
The internal review examines whether the officer followed departmental use-of-force policies, which are often stricter than constitutional requirements. An officer can be found legally justified under Graham and still be found to have violated department rules. If the review concludes a policy violation occurred, consequences range from mandatory retraining and reassignment to suspension without pay or termination.
Brady Lists
One consequence that gets less attention but can effectively end a career is placement on a Brady list. Named after the Supreme Court’s 1963 decision in Brady v. Maryland, these are lists prosecutors maintain of law enforcement officers whose credibility has been seriously questioned due to misconduct, dishonesty, or integrity issues. Prosecutors are constitutionally required to disclose this information to defense attorneys whenever the officer is a witness in a criminal case. An officer on a Brady list becomes a liability in court, because defense attorneys can use the listed misconduct to attack the officer’s testimony. When an officer can no longer reliably testify, much of their value to the department is gone.
Losing the Badge Across the State
Beyond the department’s own discipline, an officer can lose their state certification to work in law enforcement at all. Every state has a Peace Officer Standards and Training (POST) board or equivalent agency that licenses officers. These boards can revoke certification for serious misconduct, including excessive or unreasonable use of force, dishonesty in investigations, abuse of power, and conduct fundamentally incompatible with the obligations of the job.
Decertification matters because it follows the officer across jurisdictions within the state. A fired officer can sometimes get hired by a different department in the same state. A decertified officer cannot. To address officers crossing state lines to find new work, the International Association of Directors of Law Enforcement Standards and Training maintains the National Decertification Index, a database that tracks officers stripped of their credentials for misconduct. Hiring agencies can check it during background investigations, though participation and reporting have varied historically.
When the Whole Department Gets Investigated
Sometimes the problem goes beyond one officer. Under 34 U.S.C. § 12601, the U.S. Attorney General can investigate an entire law enforcement agency when there is reason to believe it has engaged in a pattern or practice of conduct that violates constitutional rights.6Office of the Law Revision Counsel. 34 USC 12601 Cause of Action A single killing does not trigger this authority on its own. The Department of Justice must show that violations reflect a broader, systemic problem rather than an isolated incident.7U.S. Department of Justice. Addressing Police Misconduct Laws Enforced by the Department of Justice
When these investigations confirm a pattern, the typical outcome is a consent decree, a court-supervised agreement that requires the department to implement specific reforms around use of force, training, oversight, and accountability. Consent decrees can last for years. They involve independent monitors, regular compliance reports, and the ongoing authority of a federal court to enforce the terms. Departments operating under consent decrees often undergo fundamental changes to policies, training, and internal accountability.
Whether the DOJ pursues these investigations aggressively depends heavily on the priorities of the administration in power. Some administrations have opened dozens of pattern-or-practice investigations. Others have curtailed them sharply. The statute remains available regardless, but its use fluctuates.