You’re staring at an MBE Evidence question where the prosecutor asks a witness about a 12-year-old shoplifting conviction, and you freeze. Is that admissible? What about the balancing test? Does it matter if the witness is the defendant? Impeachment questions trip up more bar examinees than almost any other Evidence topic because the rules are technical, overlapping, and fact-sensitive.

Let’s fix that. This guide breaks down every impeachment method tested on the MBE so you can spot the issues, apply the right rule, and pick up those points.

Why Impeachment Questions Are MBE Gold

The examiners love impeachment because it forces you to juggle multiple rules simultaneously. A single fact pattern might implicate FRE 608 (character for truthfulness), FRE 609 (prior convictions), FRE 613 (prior inconsistent statements), and the collateral matter rule all at once. Miss one element and you’ll pick the wrong answer.

The good news? Impeachment follows predictable patterns. Once you internalize the framework, these questions become point-getters instead of time-wasters.

The Foundation: Who May Impeach

Start here: any party may attack any witness’s credibility, including the party that called the witness. There is no voucher rule under FRE 607. If your own witness says something unhelpful, you can impeach them.

This comes up when a prosecutor calls a reluctant witness who suddenly claims memory problems on the stand. The prosecutor can immediately impeach with the witness’s prior detailed statement to police. Don’t overthink it—impeachment is always permissible.

Prior Inconsistent Statements (FRE 613)

This is the most commonly tested impeachment method. A witness says X at trial but previously said Y. You can use that inconsistency to attack credibility.

The rule: You may impeach with a prior inconsistent statement, but if you want to introduce extrinsic evidence of that statement (like a transcript or another witness’s testimony about what was said), you must give the witness an opportunity to explain or deny the statement and give the opposing party a chance to examine the witness about it.

Critical distinction: You don’t need to confront the witness first on cross-examination. The foundation can be laid later. The witness just needs an opportunity to address it at some point.

Exception: If the prior statement is an opposing party’s statement under FRE 801(d)(2), no foundation is required. You can prove it up with extrinsic evidence without giving anyone a chance to explain.

MBE trap: Watch for answer choices that say you must show the witness the prior statement during cross-examination before asking about it. That’s the old common law rule. The Federal Rules don’t require it.

Bias, Interest, and Motive

You can always impeach a witness by showing bias, prejudice, interest, or motive to testify a particular way. This isn’t explicitly in the Federal Rules, but it’s universally recognized and heavily tested.

Example: A witness testifies favorably for the defendant. On cross, you establish that the witness is the defendant’s business partner and would lose money if the defendant were convicted. That’s classic bias impeachment.

Unlike specific instances of conduct under FRE 608(b), you can use extrinsic evidence to prove bias. But you generally must give the witness a chance to explain on cross-examination first before bringing in outside evidence.

Criminal Convictions (FRE 609)

This is where bar examinees crash and burn. FRE 609 has multiple moving parts, and the MBE loves testing the boundaries.

Two Types of Admissible Convictions

Type One: Crimes involving dishonest act or false statement. If the crime involved dishonesty (perjury, fraud, forgery, embezzlement, false pretenses), the conviction must be admitted for impeachment regardless of prejudice. No balancing test. These crimes go directly to truthfulness.

Type Two: Felonies (crimes punishable by death or imprisonment exceeding one year). These are admissible only if the court determines probative value outweighs prejudicial effect. But here’s the critical split: If the witness is a criminal defendant, the probative value must substantially outweigh the prejudicial effect (reverse 403 balancing). If the witness is anyone else, regular 403 balancing applies.

The 10-Year Rule

If more than 10 years have passed since the conviction or release from confinement (whichever is later), the conviction is admissible only if its probative value substantially outweighs prejudicial effect and the proponent gives reasonable written notice. Old convictions are presumptively inadmissible.

MBE hypo: Witness was convicted of robbery 15 years ago but served only 2 years. He was released 13 years ago. The 10-year clock runs from release, so this conviction is outside the window and requires heightened balancing plus notice.

What’s Not Admissible

Juvenile adjudications are generally inadmissible. The only exception: in a criminal case, a juvenile adjudication of a witness other than the defendant may be admitted if an adult conviction would be admissible and it’s necessary to fairly determine guilt or innocence. Translation: almost never happens.

Convictions that have been pardoned based on innocence are inadmissible. Convictions pardoned based on rehabilitation are inadmissible if the witness hasn’t been convicted of a subsequent felony.

Specific Instances of Conduct (FRE 608(b))

On cross-examination, you may ask a witness about specific instances of conduct probative of truthfulness or untruthfulness. Classic examples: lying on a job application, cheating on taxes, filing a fraudulent insurance claim.

The iron rule: You must take the witness’s answer. You cannot introduce extrinsic evidence to prove the conduct. If the witness denies lying on their resume, you’re stuck. You can’t call the former employer to prove it.

Why this rule exists: To prevent mini-trials on collateral issues. The MBE will tempt you with answer choices allowing extrinsic evidence. Resist.

Exception: This limitation doesn’t apply to criminal convictions under FRE 609. Those can be proven with court records.

Character for Truthfulness (FRE 608(a))

You can attack a witness’s credibility with opinion or reputation testimony about their character for untruthfulness. You call another witness who testifies, “In my opinion, Jane is a liar,” or “Jane has a reputation in the community for dishonesty.”

Rehabilitation: Evidence of truthful character is admissible only after the witness’s character for truthfulness has been attacked. You can’t bolster credibility preemptively.

Form matters here. You can use opinion or reputation testimony, but not specific instances of conduct (those are limited to cross-examination under 608(b)).

Sensory and Mental Deficiencies

You can impeach by showing the witness couldn’t perceive, remember, or relate events accurately. Evidence of poor vision, hearing loss, intoxication at the time of the event, or mental illness affecting perception is all fair game.

This is straightforward impeachment—just show the witness wasn’t in a position to know what they claim to know.

Contradiction and the Collateral Matter Rule

You can always cross-examine a witness to elicit testimony that contradicts their direct testimony. But can you introduce extrinsic evidence to prove the contradiction?

The rule: You cannot introduce extrinsic evidence to contradict a witness on a collateral matter—something relevant only to impeach, not independently relevant to a fact in the case.

Example: Witness testifies she met the defendant at a coffee shop. On cross, you ask if she was actually at a bar. She denies it. Can you call another witness to prove she was at a bar? No, unless the location matters to the case. If it’s relevant only to show she’s a liar, it’s collateral and extrinsic evidence is barred.

Non-collateral matters: If the contradiction relates to something independently relevant (like an element of the claim or defense), extrinsic evidence is allowed.

Impeaching Hearsay Declarants (FRE 806)

When a hearsay statement is admitted, you can attack the declarant’s credibility as if they testified as a witness. You can use any impeachment method—prior inconsistent statements, convictions, bias, character for untruthfulness.

Key difference: You don’t need to give the declarant an opportunity to explain or deny a prior inconsistent statement because they’re not on the stand. The normal FRE 613 foundation doesn’t apply.

Rehabilitation After Impeachment

Once a witness is impeached, you can rehabilitate them through:

Prior consistent statements to rebut a charge of recent fabrication, improper influence, or motive. These statements are admissible as substantive evidence under FRE 801(d)(1)(B), not just to rehabilitate.

Character evidence for truthfulness under FRE 608(a), but only after truthfulness has been attacked.

Redirect examination allowing the witness to explain or clarify the impeaching evidence.

Putting It All Together: MBE Strategy

When you see an impeachment question, work through this checklist:

  1. Identify the impeachment method: Prior inconsistent statement? Conviction? Bias? Specific conduct?
  2. Check the foundational requirements: Does FRE 613 require an opportunity to explain? Is this a 609 conviction that needs balancing?
  3. Determine if extrinsic evidence is allowed: Collateral matter? Specific conduct under 608(b)?
  4. Watch for defendant-specific rules: Reverse 403 balancing for defendant convictions under 609.

The MBE will bury the controlling rule in the facts. A question about a “15-year-old conviction” is testing the 10-year rule. A question about “asking the witness if she lied on her tax return” is testing FRE 608(b)‘s prohibition on extrinsic evidence.

What You Need to Memorize

Impeachment is rules-heavy. You need instant recall of:

If you’re using disconnected outlines or trying to memorize these rules in paragraph form, you’re making it harder than it needs to be. Impeachment rules are tested in structured, element-by-element ways. That’s exactly how FlashTables organizes them—each impeachment method gets its own row with the rule, elements, and exceptions in a side-by-side format built for active recall. When you see “FRE 609” on the MBE, you need to instantly pull up the two tracks, the balancing tests, and the 10-year rule. FlashTables covers all of this in the Evidence tables.

Master impeachment and you’ll pick up 4-6 points on test day. These rules repeat across multiple questions in every Evidence set. Get them down cold and watch those points add up.