A confidential informant can use drugs during an investigation only when a federal agent has authorized that conduct in writing, in advance, under the Attorney General’s Guidelines that govern “otherwise illegal activity.” There is no standing permission that comes with being a CI. Drug involvement, including personal use during undercover buys or to maintain cover inside a trafficking network, has to be approved case by case, and the approval level depends on how serious the conduct is. Anything the CI does outside those written boundaries is treated as an ordinary crime, and it can also cost them the cooperation deal and sink the prosecution built on their work.
The “Otherwise Illegal Activity” Rule
Federal guidelines recognize that an informant embedded in a drug operation may need to participate in criminal conduct to be credible and to gather evidence. The framework for that is called “otherwise illegal activity,” and it is what allows a CI to do things during an investigation that would otherwise be prosecutable. The Attorney General’s Guidelines set the terms.1Justia. The Attorney Generals Guidelines Regarding the Use of Confidential Informants
The core rule is that no criminal activity by a CI is authorized unless a federal agent has approved it in writing beforehand. The authorizing official has to make two findings: that the intelligence expected from the CI’s participation outweighs the risks, and that the information cannot reasonably be obtained by other means.2Office of the Inspector General, U.S. Department of Justice. The Attorney Generals Guidelines Regarding the Use of Confidential Informants The CI then signs written instructions spelling out exactly what conduct is authorized, what is off limits, and what happens if they go beyond the approved scope.
Authorizations are time-limited. Each one runs for 90 days. If the operation continues past that window, the agent has to renew the paperwork with a fresh assessment. That structure applies whether the authorized conduct is a controlled drug purchase, association with people committing crimes, or something else the CI could not lawfully do on their own.
How Drug-Related Conduct Gets Classified
The guidelines sort authorized criminal activity into two tiers based on severity, and the tier controls who has to sign off.2Office of the Inspector General, U.S. Department of Justice. The Attorney Generals Guidelines Regarding the Use of Confidential Informants
- Tier 1 covers the most serious conduct: activity involving violence or a significant risk of violence, corruption of senior public officials, and trafficking in controlled substances above certain quantities. Tier 1 authorization requires approval from both the FBI Special Agent in Charge and the U.S. Attorney for the district.
- Tier 2 covers any other authorized criminal activity. A senior FBI field manager can approve Tier 2 without a federal prosecutor’s sign-off.
Drug conduct can fall into either tier depending on the amounts and the role. A CI making a small controlled buy from a street dealer is a different animal from a CI moving trafficking-level quantities inside a distribution network, and the approval process reflects that. The heavier the drug involvement, the higher up the chain approval has to go.
Where Personal Drug Use Fits
The guidelines authorize criminal activity that is necessary for the investigation, not personal conduct on the side. If a CI’s cover genuinely requires participation that includes drug use, that has to be captured in the written authorization along with everything else the CI is permitted to do. Use outside that scope is unauthorized, and it is treated as if the CI were any other person committing a crime.
Some conduct can never be authorized, no matter the tier or the operational justification. Agents cannot give a CI permission to commit violence, obstruct justice, or engage in other specifically prohibited acts. When an informant crosses those lines on their own, the fallout can reach beyond the CI to unravel the prosecution built on their cooperation.2Office of the Inspector General, U.S. Department of Justice. The Attorney Generals Guidelines Regarding the Use of Confidential Informants
What Happens If a CI Uses Drugs Outside the Authorization
Unauthorized drug use has three sets of consequences: for the CI personally, for the cooperation relationship, and for the case.
For the CI, drug use that was not covered by written authorization is criminal conduct like any other. The written instructions the CI signed at the start of the relationship spell out that exceeding the approved scope is not protected. There is no immunity that comes with the badge of being an informant.
For the relationship, agencies conduct ongoing suitability reviews of their informants, and problems surfaced in those reviews can end the arrangement. The Internal Revenue Service treats failure to report CI payment income as a suitability problem serious enough to justify termination, and the guidelines contemplate the same for other conduct that shows the CI cannot be trusted.3Internal Revenue Service. IRM 9.4.2 – Sources of Information Unauthorized drug use, particularly if it suggests active addiction the CI concealed, fits that pattern. When a CI is terminated for cause, the reason can be shared with other government agencies involved in the investigation, including the U.S. Attorney’s Office.
For the case, prosecutors have constitutional obligations that pull unauthorized CI conduct into the light. Under Brady v. Maryland, prosecutors must disclose evidence favorable to the defendant that is material to guilt or punishment.4U.S. Supreme Court Reports. Brady v. Maryland, 373 U.S. 83 (1963) The Giglio line of cases extends that to impeachment material, which includes anything undermining a testifying informant’s credibility. Department of Justice policy requires prosecutors to review the entire informant file before trial, and disclosure obligations reach known substance abuse issues, prior false statements, and uncharged criminal conduct that could motivate the CI to please investigators. If a CI used drugs outside the authorization, that is exactly the kind of information the defense is entitled to see.5United States Department of Justice. Justice Manual 9-5.000 – Issues Related to Discovery, Trials, and Other Proceedings Cases have been overturned when prosecutors concealed that a witness was a paid informant or that testimony had been coached, and the same disclosure principles apply to hidden misconduct.
Recruiting Informants Who Already Use Drugs
A significant share of the people law enforcement approaches about cooperation are already using drugs, sometimes as part of the same criminal environment being investigated. The guidelines require agents to assess a potential informant’s reliability, criminal history, and motivations before signing them up, and they mandate continuing reviews once the relationship is underway.6Federal Bureau of Investigation. What Is the FBIs Policy on the Use of Informants
That suitability determination is where existing drug use is supposed to be flagged. A person in active withdrawal or facing their first felony charge is not well positioned to weigh the risks of undercover work against the benefits of a plea deal, and pre-existing vulnerabilities like substance use disorders tend to be compounded rather than eased by the stress of covert work. Recruiting someone in that condition creates operational risk and ethical exposure both, which is why several states have enacted laws requiring agencies to evaluate a potential CI’s age, maturity, emotional state, and risk level before deployment. Some of those state laws also bar officers from promising more lenient treatment than they can actually deliver.
Enforcement of these standards varies across agencies. The written guidelines are one thing; how consistently they are applied to a person recruited in a booking cell at three in the morning is another.
State Enforcement and Local Variation
Everything above is federal. State and local agencies set their own rules, and while many follow structures similar to the federal tier system, the specifics differ. Some state laws address CI screening explicitly, particularly around age, mental health, and substance use. Others leave more discretion to individual departments. If the question involves a state investigation rather than a federal one, the applicable rules are the ones set by that state and that department, not the Attorney General’s Guidelines.
The Boundaries Worth Being Clear About
A few things the framework does not do are worth naming, because it is easy to assume otherwise.
Being a CI does not decriminalize personal drug possession or use in the CI’s off-hours. The authorization covers what is necessary for the investigation and only what is written down.
Cooperation does not erase a pending case. Sentence reductions for substantial assistance are available in federal court, but they run through prosecutor-filed motions and judicial discretion, not through automatic credit. A CI who violates the terms of cooperation by using drugs outside the authorization can lose access to those reduction pathways entirely.
The handler cannot verbally green-light drug use to fill a gap in the paperwork. The requirement of prior written authorization is the structural safeguard, and conduct outside it is not protected by the handler’s after-the-fact endorsement.
Anyone weighing whether to become a confidential informant, or already working as one and unsure what their written authorization actually covers, should get that answered by their own attorney before the next controlled operation, not after.