When Federal Agents Interpret Coded Drug Conversations

Federal drug prosecutions frequently rely on recorded telephone calls, text messages, and intercepted conversations. The government may claim that ordinary words, numbers, or phrases are coded references to drugs, quantities, prices, or participants.

Federal agents cannot automatically tell the jury what every disputed statement means. The admissibility of an agent’s interpretation depends on the source of the agent’s knowledge, the reliability of the interpretation, and whether specialized knowledge is actually necessary.

If federal agents intend to interpret recorded conversations as evidence of drug trafficking, contact federal criminal defense attorney Michael J. Petro immediately. The testimony may be challenged under Federal Rules of Evidence 701, 702, 703, and 403, as well as Federal Rule of Criminal Procedure 16.

When Does Interpreting a Conversation Require an Expert?

Some drug organizations use code words to disguise the purpose of their conversations. A reference to tickets, shirts, food, numbers, or another apparently innocent subject may allegedly represent drugs, money, quantity, or quality.

Expert testimony may help a jury understand terminology with specialized meanings in the narcotics trade. However, the government should not use an expert merely to place an official interpretation on ordinary language the jurors can understand themselves.

The disputed testimony must first be classified as either lay opinion under Rule 701 or expert opinion under Rule 702.

Lay Opinion Under Rule 701

Rule 701 permits a nonexpert witness to offer an opinion when it is:

• Rationally based on the witness’s perception

• Helpful in understanding the testimony or deciding a fact

• Not based on scientific, technical, or other specialized knowledge within Rule 702

An investigating agent may sometimes offer lay testimony about a conversation when the interpretation comes from firsthand involvement in that particular investigation. For example, the agent may have personally monitored a lengthy series of calls and learned how the participants used particular terms from the context of those communications.

The government cannot avoid Rule 702 by labeling specialized narcotics opinions as lay testimony. When an agent relies on training and experience from other drug investigations, the interpretation is generally expert testimony subject to Rule 702.

Expert Testimony Under Rule 702

An officer who relies on specialized narcotics experience must satisfy the requirements of Federal Rule of Evidence 702.

The government must establish that it is more likely than not that:

• The specialized knowledge will help the jury

• The testimony is based on sufficient facts or data

• The testimony results from reliable principles and methods

• The opinion reflects a reliable application of those principles and methods to the case

The officer should explain how training and experience support each interpretation. A conclusion is not reliable merely because an experienced agent states it.

For a broader discussion, see Challenging Police Expert Testimony Under Federal Rule 702.

Ordinary Language Does Not Always Need Interpretation

Expert testimony must help the jury understand something outside ordinary experience. An agent should not be permitted to interpret a clear statement simply because the government prefers the agent’s version of its meaning.

Potential objections arise when an agent:

• Interprets language that is not coded or ambiguous

• Merely summarizes the government’s theory

• Selects an incriminating meaning without addressing other reasonable interpretations

• Restates what another witness could testify to directly

• Tells the jury what conclusion to draw from the conversation

• Interprets the defendant’s intent rather than specialized terminology

An expert may explain recognized drug terminology, but the jury remains responsible for deciding what the speakers meant and whether the government proved the charged offense.

The Government Must Disclose Its Expert Opinions

Federal Rule of Criminal Procedure 16(a)(1)(G) requires written expert disclosures when properly requested by the defense.

The disclosure for each government expert must include:

• A complete statement of every opinion the government intends to elicit

• The bases and reasons for each opinion

• The witness’s qualifications

• Publications authored during the previous ten years

• Other cases in which the witness testified as an expert during the previous four years

The expert must generally approve and sign the disclosure. The court must set a disclosure deadline sufficiently before trial to give the defense a fair opportunity to meet the government’s evidence.

A disclosure stating only that an agent will interpret coded drug language based on training and experience may be inadequate. The defense should determine which words the agent will interpret, the proposed meaning of each term, and the factual and methodological basis for each interpretation.

Dual Role Agents Create Special Risks

A case agent may testify as both a fact witness and an expert witness.

As a fact witness, the agent may describe surveillance, searches, recorded calls, arrests, and other events personally observed during the investigation.

As an expert, the same agent may interpret coded language or explain drug trafficking practices based on experience obtained outside the case.

Combining those roles creates substantial risks:

• The jury may not understand when the agent is stating facts and when the agent is offering opinions

• The agent’s expert status may give factual testimony an undeserved appearance of reliability

• The jury may assume the agent knows undisclosed incriminating information

• The agent may use knowledge obtained during the investigation without identifying its source

• Hearsay or testimonial statements may be presented indirectly as expert analysis

The court may reduce confusion by separating the two portions of testimony, requiring a clear foundation for each opinion, and instructing the jury about the agent’s different roles.

United States v. York

In United States v. York, 572 F.3d 415 (7th Cir. 2009), the government recorded conversations during a controlled purchase of crack cocaine.

The speakers did not expressly refer to cocaine. The government argued that apparently innocent phrases, including references to numbers and “nine probably hard,” were coded drug language.

The prosecution called two law enforcement witnesses to interpret the conversations. One officer was an outside narcotics expert who reviewed the transcripts. The other was the FBI case agent who participated in the investigation and testified as both a fact witness and an expert.

The Case Agent Offered Expert Testimony

The government did not formally offer the case agent as an expert before asking him to interpret disputed words and phrases.

The Seventh Circuit concluded that most of the interpretations depended on specialized narcotics knowledge and therefore fell under Rule 702. The testimony was not ordinary lay opinion merely because the witness was the investigating agent.

The government should also have provided a written expert disclosure under Rule 16. However, the defense did not properly raise the disclosure violation at trial or establish resulting prejudice on appeal.

Problems With the Agent’s Dual Role

The case agent moved repeatedly between factual testimony about the investigation and expert interpretations of the recorded language.

The government sometimes asked the agent to rely on both his general drug experience and his knowledge of the particular investigation. This blending made it difficult to determine whether the interpretation came from expertise, personal investigation, or information received from another person.

The Seventh Circuit concluded that the trial court should have excluded the agent’s interpretations of several terms because the dual roles were not adequately separated. The court nevertheless found the errors harmless because of the strength of the remaining evidence and affirmed the conviction.

The Seventh Circuit’s complete opinion in United States v. York illustrates why timely and specific objections are essential.

Challenging an Agent’s Interpretation

Defense counsel should identify every word or phrase the agent intends to interpret and determine:

• Whether the language is genuinely coded or ambiguous

• Whether jurors need specialized assistance

• Whether the agent is offering lay or expert testimony

• What facts or data support the interpretation

• Whether the analytical method is reliable

• Whether the opinion was properly disclosed under Rule 16

• Whether the agent relied on statements from an informant or another witness

• Whether the opinion invades the jury’s role or addresses the defendant’s mental state

• Whether the agent’s fact and expert roles can be meaningfully separated

A motion in limine may seek exclusion of the testimony, a more complete expert disclosure, a pretrial Rule 702 hearing, limits on dual role testimony, or an appropriate jury instruction.

Attorney Michael J. Petro represents individuals facing federal drug charges and other serious federal prosecutions. Contact federal criminal defense attorney Michael J. Petro today if agents plan to interpret recorded conversations as proof of your involvement in a federal crime.