Yes, exposing a confidential informant is illegal in most circumstances. Federal law treats it as witness tampering, obstruction of justice, or retaliation, with prison sentences that reach 20 or 30 years depending on how the disclosure is made and why. State witness-intimidation laws can apply on top of that, and the informant can sue in civil court for the money they lose and the harm they suffer. The question of whether it is illegal to expose a confidential informant really has two answers: a private person doing it to interfere with a case or punish a cooperator is committing a crime, while a judge ordering the government to reveal an informant during a prosecution is the system working as designed.
Federal Witness Tampering and Obstruction
The main federal statute is 18 U.S.C. § 1512, which makes it illegal to tamper with a witness, victim, or informant. It covers intimidation, threats, and corrupt persuasion used to stop someone from communicating with federal law enforcement about possible crimes. Publishing an informant’s name to scare them silent or to derail an investigation sits squarely inside the statute.1Office of the Law Revision Counsel. 18 U.S. Code 1512 – Tampering With a Witness, Victim, or an Informant
Penalties scale with the method. Intimidation or corrupt persuasion carries up to 20 years. Using physical force pushes the maximum to 30. There does not need to be a case already filed, either; the statute says an official proceeding need not be pending or about to be instituted at the time of the offense.1Office of the Law Revision Counsel. 18 U.S. Code 1512 – Tampering With a Witness, Victim, or an Informant
The general federal obstruction statute, 18 U.S.C. § 1503, is a second tool. It applies when someone tries to impede the administration of justice in a federal court proceeding through corrupt means, threats, or force. Standard obstruction carries up to 10 years; cases involving attempted killing carry up to 20.2Office of the Law Revision Counsel. 18 USC 1503 – Influencing or Injuring Officer or Juror Generally
Both statutes require intent. Accidentally revealing an informant is not a crime. Prosecutors have to show the disclosure was meant to interfere with an investigation or proceeding, not just that it happened to have that effect.
Federal Retaliation Charges
Exposing an informant as payback for cooperating is its own federal crime. Under 18 U.S.C. § 1513, retaliating against someone for providing information to law enforcement about a federal offense carries serious prison time, and the statute reaches well beyond physical violence.3Office of the Law Revision Counsel. 18 USC 1513 – Retaliating Against a Witness, Victim, or an Informant
- Retaliation involving bodily injury, property damage, or threats: up to 20 years.
- Knowingly taking any action harmful to an informant, including interference with their employment or livelihood, as retaliation for providing truthful information: up to 10 years.
- Attempted killing: up to 30 years.
- Conspiracy to retaliate: the same penalty as the underlying offense.
The “any harmful action” provision is the one most likely to catch someone who posts an informant’s identity online. No physical threat is required. If outing a cooperator costs them their job or drives them into hiding, and the point was to punish them for talking, that is a federal felony on its own.3Office of the Law Revision Counsel. 18 USC 1513 – Retaliating Against a Witness, Victim, or an Informant
State Charges
Every state has witness tampering and obstruction laws, and most are written broadly enough to cover exposing an informant when the point is to interfere with a case. They typically prohibit conduct meant to stop someone from cooperating with law enforcement, whether through threats, harassment, or other interference. Many states charge tampering connected to serious felonies as a felony itself, and some have standalone witness-intimidation statutes that don’t require a direct threat; knowingly publishing someone’s informant status in a way a reasonable person would find intimidating can be enough.
Which jurisdiction prosecutes usually tracks which agency the informant was working with. Cooperators with the DEA or FBI pull in federal charges under § 1512 or § 1513. Cooperators with local police on state-level cases get handled by state prosecutors. Both can bring charges in some situations.
Civil Lawsuits by the Informant
Prison is not the only exposure. The informant whose identity was revealed can sue in civil court. These cases typically run on theories like invasion of privacy and intentional infliction of emotional distress, and the damages add up.
Out-of-pocket losses are the simplest category. An informant who has to relocate for safety can recover moving costs, temporary housing, and the expense of starting over somewhere else. Lost income is another standard claim, especially when they have to leave a job or shut down a business because staying put is no longer safe.
Courts also award damages for psychological harm. Living under the constant threat of retaliation from the people you informed on produces real, documented injury. The informant doesn’t have to prove they were actually attacked; the reasonable fear of harm that follows from having your identity put in front of dangerous people is itself compensable.
Does the First Amendment Protect It?
Free speech does not cover every disclosure of an informant’s identity. The First Amendment protects a great deal of speech, but it has never protected speech meant to facilitate a crime or incite violence. Courts look at the speaker’s intent and the likely consequences.
Posting an informant’s name and address on social media with the obvious purpose of putting them in danger is not protected. Courts analyze whether a statement is a “true threat,” meaning a serious expression of intent to commit violence against a specific person. The speaker does not have to plan to carry out the violence personally. Adding details like a home address or daily routine makes it far more likely a court treats the post as a true threat rather than opinion.
Speech most likely to receive protection involves matters of genuine public concern obtained through lawful means. A journalist investigating corruption in a law enforcement agency’s informant program stands on much firmer ground than someone circulating a “snitch list” to intimidate cooperators. Even journalistic reporting can lose protection if the disclosure creates a direct and imminent threat to someone’s life. The analysis weighs the public interest in the information against the danger the disclosure creates for the person named.
When Disclosure Is Legal
Not every disclosure of an informant’s identity is a crime. In some situations the law requires the government to reveal who its informants are, usually when a defendant’s right to a fair trial collides with the government’s interest in keeping the name secret.
The Supreme Court set the framework in Roviaro v. United States. The government has a privilege to withhold an informant’s identity to encourage cooperation, but that privilege gives way when knowing the identity is relevant and helpful to the defense, or essential to a fair trial. Courts weigh the public interest in protecting the flow of information to law enforcement against the defendant’s ability to prepare a defense, considering the crime charged, the defenses available, and how central the informant’s role was. When the informant was the only eyewitness or at the center of the alleged crime, disclosure is far more likely.4Justia U.S. Supreme Court Center. Roviaro v. United States
Separately, Brady v. Maryland requires prosecutors to turn over evidence favorable to the defendant. If an informant has information tending to prove innocence or reduce punishment, suppressing it violates due process.5Justia. Brady v. Maryland
What separates these lawful disclosures from the criminal kind is authorization. A judge ordering disclosure after balancing the competing interests is the legal system working as designed. A private citizen outing an informant to sabotage an investigation or put them in danger is the crime.
Extra Exposure for Police, Prosecutors, and Agents
Government officials who leak an informant’s identity face consequences that stack. They carry a professional duty to protect the information, and breaking it triggers criminal, administrative, and professional penalties at the same time.
Criminally, they face the same witness tampering and retaliation charges as anyone else. If the informant qualifies as a covert agent in the national security context, they also risk prosecution under the Intelligence Identities Protection Act. Under 50 U.S.C. § 3121, someone with authorized access to classified information who intentionally reveals the identity of a covert agent faces up to 15 years in prison, and someone who learns a covert agent’s identity through classified access and then discloses it faces up to 10. Any sentence under this law runs consecutively with other sentences.6Office of the Law Revision Counsel. 50 USC 3121 – Protection of Identities of Certain United States Undercover Intelligence Officers, Agents, Informants, and Sources
One boundary worth flagging: the Intelligence Identities Protection Act is built for the national security world. It covers intelligence officers, agents, and sources whose relationship to the United States is actively concealed through classified programs. A typical street-level informant working with local police on drug cases would not fall under this statute. For those informants, the witness tampering and retaliation laws are what apply.6Office of the Law Revision Counsel. 50 USC 3121 – Protection of Identities of Certain United States Undercover Intelligence Officers, Agents, Informants, and Sources
The professional consequences stand on their own. A law enforcement officer who leaks an informant’s identity faces termination, loss of security clearance, and internal affairs investigation. A prosecutor who does the same can be disbarred. Those sanctions can end a career even without a criminal charge.