Criminal Discovery

Why Criminal Discovery Matters to a Fraud Examiner
Discovery is the pre-trial process through which each side in a legal proceeding learns what evidence the other side holds. For a Certified Fraud Examiner, criminal discovery matters for three practical reasons. First, almost everything a fraud examiner produces during an investigation that is later referred to prosecutors – reports, interview memoranda, spreadsheets, timelines, exhibits – may end up in the hands of the defense. Second, the rules of criminal discovery are far narrower than the rules of civil discovery, and the CFE exam repeatedly tests whether you understand that difference. Third, a fraud examiner who misunderstands disclosure obligations can cause a prosecution to collapse: suppressed exculpatory evidence, mishandled witness statements, or an unguarded written comment can lead to dismissal, reversal, or a mistrial. In the Fraud Examiners Manual, criminal discovery sits inside the Law section under Criminal Prosecutions, and the exam approaches it from the standpoint of the U.S. federal system while reminding candidates that other jurisdictions differ.

What Criminal Discovery Is
Criminal discovery is the limited, rule-governed exchange of information between the prosecution and the defendant before a criminal trial. Unlike civil litigation, where parties can use interrogatories, requests for admission, document requests, and wide-ranging depositions to learn virtually everything about the opposing case, criminal discovery is restricted because of the constitutional protections afforded to the accused and the government's interest in protecting witnesses, informants, and ongoing investigations. In the U.S. federal system, criminal discovery is governed mainly by:
• Federal Rule of Criminal Procedure 16 – the core disclosure rule for both sides.
• The Brady doctrine (Brady v. Maryland, 1963) – the constitutional duty of the prosecution to disclose exculpatory evidence.
• The Giglio doctrine (Giglio v. United States, 1972) – the duty to disclose evidence that could impeach government witnesses, including promises of leniency.
• The Jencks Act (18 U.S.C. § 3500) and Rule 26.2 – governing when prior statements of witnesses must be turned over.
• Rule 6(e) – secrecy of grand jury proceedings.
• Rules 12.1 and 12.2 – notice of alibi and insanity defenses.
State systems follow similar frameworks, with some states (such as those with so-called open-file policies) being more generous and others more restrictive.

How Criminal Discovery Works
1. The prosecution's disclosure obligations under Rule 16. Upon the defendant's request, the government must disclose: (a) the substance of the defendant's relevant oral statements made in response to interrogation by a person the defendant knew was a government agent, if the government intends to use them at trial; (b) the defendant's written or recorded statements within the government's possession; (c) the defendant's prior criminal record; (d) documents and tangible objects that are material to preparing the defense, that the government intends to use in its case-in-chief, or that were obtained from or belong to the defendant; (e) reports of physical or mental examinations and scientific tests; and (f) a written summary of any expert testimony the government intends to use, including the expert's opinions, the bases for them, and qualifications. Note that for a fraud case, this means the prosecution's forensic accounting expert – who may be a CFE – must be summarized to the defense before trial.

2. What the prosecution does NOT have to disclose under Rule 16. The government's work product is protected: internal reports, memoranda, and other documents prepared by government attorneys or agents in connection with investigating or prosecuting the case. Also protected are statements of prospective government witnesses, which fall under the Jencks Act rather than Rule 16.

3. Reciprocal discovery by the defendant. Discovery in criminal cases is reciprocal but triggered by the defense. If the defendant requests and receives documents, tests, or expert summaries from the government, the defendant must in turn disclose the same categories of material that the defense intends to use in its case-in-chief. The defense never has to disclose the defendant's own statements, and the defendant can never be compelled to testify or be deposed because of the Fifth Amendment privilege against self-incrimination.

4. Brady and Giglio – the constitutional overlay. Regardless of whether the defense asks, the prosecution must disclose evidence favorable to the accused that is material to guilt or punishment. Evidence is material when there is a reasonable probability that disclosure would have changed the outcome. Under Giglio, this includes impeachment material: plea agreements, immunity deals, payments to informants, prior inconsistent statements, and a witness's criminal history. Importantly, the duty extends to evidence known to the whole prosecution team, including investigators and agents – and, in practice, to fraud examiners working closely with prosecutors. A fraud examiner who discovers facts that undercut the case cannot bury them.

5. The Jencks Act – witness statements. Prior statements of a government witness (signed or adopted written statements, substantially verbatim recordings or transcriptions, and grand jury testimony) need not be produced until after the witness has testified on direct examination. Many prosecutors voluntarily provide Jencks material early to avoid delaying trial. For fraud examiners, this means a witness's signed statement or an interview memorandum that the witness adopted may be turned over to the defense once the witness takes the stand, and will be used for cross-examination.

6. Tools that are limited or unavailable in criminal cases. Interrogatories and requests for admission do not exist in criminal practice. Depositions are not a discovery device; under Rule 15 they are allowed only in exceptional circumstances to preserve the testimony of a witness who may be unavailable at trial (for example, a seriously ill or foreign-based witness), and the defendant generally has the right to be present. Instead of interrogatories, a defendant may move for a bill of particulars under Rule 7(f), which forces the government to supply more detail about the charges so the defense can prepare and avoid surprise – but it is not a device for obtaining the government's evidence.

7. Grand jury secrecy. Grand jury matters are secret under Rule 6(e). A defendant's own grand jury testimony is discoverable under Rule 16, and witness grand jury testimony becomes Jencks material after the witness testifies at trial, but the defense is not generally entitled to grand jury transcripts in advance.

8. Notice provisions. If the government demands it, the defense must give notice of an alibi defense and the witnesses supporting it, and the government must reciprocally disclose rebuttal witnesses. Similar notice applies to an insanity defense or expert testimony about mental condition.

9. Continuing duty and sanctions. Both sides have a continuing duty to disclose newly discovered material. If a party fails to comply, the court may order disclosure, grant a continuance, exclude the undisclosed evidence, or enter any other just order. Suppression of Brady material can result in reversal of a conviction or a new trial.

Practical Implications for the Fraud Examiner
• Assume every document you create may be read by defense counsel. Keep reports factual, avoid speculation and inflammatory language, and separate facts from opinions.
• Preserve all evidence, including evidence that helps the suspect; destroying or withholding it can trigger Brady problems and spoliation accusations.
• Maintain a clear chain of custody for documents and electronic evidence so they survive admissibility challenges.
• Be careful with interview memoranda. If a witness reviews and adopts a memorandum, it likely becomes a Jencks statement; inconsistent notes can be used to impeach the witness.
• Understand that your own expert opinions, bases, and qualifications will be summarized to the defense in advance of trial.
• Recognize that once an investigation is referred to prosecutors and you act as part of the prosecution team, the prosecutor's disclosure duties effectively extend to your files.

Comparison: Civil vs. Criminal Discovery (frequently tested)
• Scope: civil – broad, anything relevant and proportional; criminal – narrow, listed categories only.
• Depositions: civil – routine; criminal – exceptional, only to preserve testimony.
• Interrogatories and requests for admission: civil – yes; criminal – no.
• Compelling the opposing party's testimony: civil – yes, parties can be deposed; criminal – the defendant cannot be compelled.
• Trigger: civil – each side has independent obligations; criminal – defense request triggers reciprocal duties, while Brady applies regardless of request.
• Timing of witness statements: civil – available in discovery; criminal – generally only after the witness testifies (Jencks).
• Constitutional dimension: civil – minimal; criminal – Fifth Amendment, Due Process (Brady), Sixth Amendment confrontation rights.

International Note
Outside the United States, disclosure regimes vary. In England and Wales, the Criminal Procedure and Investigations Act 1996 requires the prosecution to disclose unused material that might reasonably undermine the prosecution case or assist the defence, and the defence must serve a defence statement. Civil law jurisdictions typically provide access to the investigative dossier rather than an adversarial exchange. The CFE exam focuses primarily on U.S. federal rules but expects you to know that procedures differ by jurisdiction.

Exam Tips: Answering Questions on Criminal Discovery
1. Anchor on the central theme: criminal discovery is more limited than civil discovery. If an answer choice suggests a criminal defendant can use interrogatories, freely depose government witnesses, or obtain the prosecutor's internal memoranda, it is almost certainly wrong.
2. Know Rule 16's categories cold. Defendant's statements, prior record, documents and objects, test reports, and expert summaries. If a question lists an item not in these categories, such as the names of all government witnesses or agent notes, recognize it as outside the mandatory disclosure.
3. Distinguish Brady from Rule 16. Rule 16 disclosure is triggered by the defendant's request and governs specific items; Brady is a constitutional duty that applies whether or not the defense asks and is defined by materiality and favorability to the accused. Questions using the words exculpatory or favorable to the defendant point to Brady; questions about leniency deals or witness credibility point to Giglio.
4. Remember the Jencks timing rule. Witness statements are produced after the witness testifies on direct, not before trial as a matter of right. If a question asks when the defense is entitled to a government witness's prior statement, choose the option referencing after direct examination.
5. Depositions in criminal cases preserve testimony; they do not discover it. Any option describing criminal depositions as a routine discovery tool is incorrect; the correct framing involves exceptional circumstances and an unavailable witness.
6. Reciprocity is conditional. The defendant's duty to disclose arises only after the defendant requests and obtains the same category of material from the government, and it never includes the defendant's own statements or compelled testimony.
7. Bill of particulars is about clarifying the charges, not obtaining evidence. If a question describes a defendant seeking more detail about the indictment, the answer is a bill of particulars, not interrogatories or a deposition.
8. Watch for fraud examiner scenario questions. Typical fact patterns ask whether an examiner's report, notes, or discovered evidence must be turned over. The safe reasoning is: exculpatory or impeaching information must be disclosed (Brady/Giglio); adopted witness statements become Jencks material after testimony; expert opinions are summarized in advance; and nothing should be destroyed or withheld.
9. Read for the word material. Both Rule 16 (documents material to preparing the defense) and Brady (material to guilt or punishment) use materiality as a threshold. Options that require disclosure of every conceivable piece of information are too broad; options that excuse disclosure of clearly exculpatory evidence are too narrow.
10. Eliminate absolutes. Answers stating that the defense has no right to any discovery, or that the prosecution must disclose its entire file, misstate the balanced, rule-based nature of the system. The correct answer usually reflects limited, defined, reciprocal, constitutionally-supplemented disclosure.
11. Manage time. Criminal discovery questions are usually conceptual rather than computational. Identify the rule being tested (Rule 16, Brady, Giglio, Jencks, Rule 15, Rule 6(e)), recall the one-sentence principle, and choose the option that matches it.

Quick Review Summary
Criminal discovery is a limited, rule-driven exchange of evidence before a criminal trial. The prosecution must disclose the defendant's statements, record, relevant documents, test results, and expert summaries upon request, plus all exculpatory and impeachment evidence regardless of request. Witness statements are generally withheld until after the witness testifies. The defendant discloses reciprocally but can never be compelled to testify. Depositions are rare and serve only to preserve testimony; interrogatories do not exist. For fraud examiners, the practical lesson is simple: write as if the defense will read it, preserve everything, disclose what hurts as well as what helps, and understand how your work product will travel through the criminal process.