The Bad-Act Boundary: Ask About Lying, Not Mere Misconduct
Evidence offered to show that a witness is truthful or untruthful is governed by the identity of the proof: a specific act, a criminal conviction, or a religious belief or opinion. For a nonconviction act, the controlling rule is Federal Rule of Evidence 608(b).
Run Rule 608(b) in this order:
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Identify the purpose. The act must be probative of the witness’s character for truthfulness or untruthfulness. Lying, falsifying records, forgery, and cheating may qualify because they bear on a willingness to tell the truth. Violence, drug use, or general irresponsibility ordinarily do not.
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Identify the procedural setting. The court may allow inquiry about the act on cross-examination. A party may not introduce the act initially through a document or another witness merely to attack or support truthfulness.
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Respect the extrinsic-evidence bar. Under Rule 608(b), extrinsic evidence is not admissible to prove the specific act for this purpose. If the witness admits the act, the answer may be used. If the witness denies it, the examiner generally must accept the denial; the examiner may not call another witness or introduce a record solely to prove the act.
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Apply discretion and Rule 403. Even a truthfulness-related act is not automatically admissible. The court may permit the question, subject to Rule 403.
The act need not be criminal and need not have produced a charge or conviction. That is the central distinction from Rule 609. Conversely, a conviction cannot be reclassified as an ordinary “bad act” to evade Rule 609’s specific conviction rules.
Rule 608(b) also applies when the witness being cross-examined has testified about another witness’s character for truthfulness. For example, if a character witness says that Pat is honest, the examiner may, with the court’s permission, ask whether the character witness knows that Pat falsified business records. The same limits remain: the question must concern truthfulness, must be asked on cross, and cannot be supported with extrinsic evidence solely to prove the falsification.
This is a closed-book topic: state Rules 608(b), 609, and 610 with their triggers and consequences from memory.
| Rule | Starting classification | What may be offered | Decisive limit |
|---|---|---|---|
| Rule 608(b) | Specific act, not offered as a conviction | Cross-examination inquiry | Must concern truthfulness; no extrinsic proof; court discretion and Rule 403 |
| Rule 609(a)(2) | Conviction for any crime whose elements require dishonesty or false statement | Conviction evidence | Must be admitted; no ordinary Rule 403 balancing |
| Rule 609(a)(1) | Conviction for a crime punishable by death or more than one year | Conviction evidence | Rule 403 for civil cases and criminal cases when witness is not defendant; stricter defendant standard in a criminal case |
| Rule 609(b) | Conviction more than ten years old under the later-date calculation | Conviction evidence only in an exceptional case | Probative value supported by specific facts must substantially outweigh prejudice; reasonable written notice required |
| Rule 610 | Religious belief or opinion offered for credibility | None for that credibility purpose | May neither attack nor support credibility |
A specific act that independently shows bias or contradicts testimony may raise a different impeachment question, but that is the province of the sibling chapter on capacity, contradiction, and bias-not a way to relax Rule 608(b).
Conviction Evidence: Elements, Age, and the Defendant’s Protection
When the proof is a conviction, begin with the crime’s elements and the punishment authorized for the offense. Do not begin by asking whether the underlying conduct sounds dishonest. Rule 609 distinguishes convictions whose elements require deceit from other convictions.
Rule 609(a)(2): crimes of dishonesty or false statement. Evidence of a conviction for any crime must be admitted if the court can readily determine that establishing the elements of the crime required proving a dishonest act or false statement. The crime may be a felony or a misdemeanor. Perjury and a crime expressly requiring a false statement are straightforward examples.
This category is controlled by the elements, not by the prosecutor’s factual theory or the witness’s reputation. A conviction for an offense whose elements do not require dishonesty does not become a Rule 609(a)(2) conviction merely because the facts surrounding it involved a lie. When Rule 609(a)(2) applies, the ordinary balancing rules do not give the court discretion to exclude the conviction as unfairly prejudicial.
Rule 609(a)(1): other serious crimes. A conviction for a crime punishable by death or imprisonment for more than one year may be used under a different standard when it is not a Rule 609(a)(2) crime. The relevant punishment is the punishment authorized for the offense, not the sentence actually imposed.
The standard depends on the case and the witness:
- In a civil case, or in a criminal case when the witness is not the defendant, the conviction is admitted subject to Rule 403. Thus, exclusion requires the ordinary Rule 403 showing that unfair prejudice substantially outweighs probative value.
- In a criminal case when the witness is the defendant, the conviction is admitted only if its probative value outweighs its prejudicial effect to that defendant. This is a more protective standard because the conviction may cause the jury to decide the present criminal charge based on an impermissible propensity inference.
The conviction is offered to evaluate credibility, not as substantive proof that the witness committed the conduct described in the conviction. The proponent ordinarily proves the conviction itself, not every disputed detail of the prior offense. A felony that is also a crime of dishonesty belongs under Rule 609(a)(2), not the less direct Rule 609(a)(1) route.
Rule 609(b): convictions more than ten years old. The ten-year period is measured from the later of:
- the date of the conviction; or
- the date of the witness’s release from confinement imposed for that conviction.
If more than ten years have passed from that later date, the conviction is admissible only if:
- its probative value, supported by specific facts and circumstances, substantially outweighs its prejudicial effect; and
- the proponent gives reasonable written notice of the intent to use it, so the opposing party has a fair opportunity to contest it.
The direction of the balancing is crucial. For an ordinary serious conviction, prejudice must substantially outweigh probative value for exclusion under Rule 403. For a conviction over ten years old, probative value must substantially outweigh prejudice for admission. The old-conviction rule controls even if the conviction otherwise concerns dishonesty.
Rule 609(c): pardon, annulment, or rehabilitation. Evidence of a conviction is not admissible if the conviction has been the subject of a pardon, annulment, certificate of rehabilitation, or equivalent procedure based on a finding that the person has been rehabilitated and is not likely to commit another crime. It is also excluded when the procedure was based on a finding of innocence. A pardon or similar action granted for some unrelated reason does not automatically trigger these exclusions.
Rule 609(d): juvenile adjudications. A juvenile adjudication is admissible under Rule 609 only if all of these conditions are met:
- It is offered in a criminal case.
- The adjudication was of a witness other than the defendant.
- A conviction of the witness for that offense would be admissible to attack credibility.
- Admitting the adjudication is necessary to fairly determine the defendant’s guilt or innocence.
Thus, a juvenile adjudication is not simply treated like an adult conviction, and it is not available against the criminal defendant who is the subject of the adjudication.
Rule 609(e): pending appeal. The fact that a conviction is being appealed does not by itself make the conviction inadmissible. Analyze the conviction under the applicable Rule 609 category and limit.
The order matters because an early classification may terminate the analysis:
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The recurring errors are concrete classification errors:
- Asking about a witness’s assault conviction under Rule 608(b) when the proof is actually governed by Rule 609.
- Calling the employer to prove a falsified application after the witness denies the act, despite Rule 608(b)’s extrinsic-evidence bar.
- Treating every felony as automatically admissible instead of separating Rule 609(a)(2) from Rule 609(a)(1).
- Counting ten years from conviction when the later date is the witness’s release from confinement.
- Offering a witness’s religious belief that honesty is important to support credibility, despite Rule 610.
Religious Credibility Proof: Keep Belief Outside the Attack
Rule 610 provides that evidence of a witness’s religious beliefs or opinions is not admissible to attack or support the witness’s credibility. The rule is complete in both directions: religion cannot be used to show that the witness is more trustworthy, and it cannot be used to show that the witness is less trustworthy.
The near miss is between a religious belief and an independently relevant act. “The witness believes lying is sinful” is barred when offered to support credibility. “The witness falsified a loan application” may be a Rule 608(b) inquiry if it is probative of truthfulness, even if the witness belongs to a religious organization. The admissibility comes from the specific dishonest act and Rule 608(b), not from the witness’s religion.
Likewise, evidence of religious affiliation is not transformed into admissible character evidence by calling it “background.” If its purpose is to persuade the factfinder that the witness is honest or dishonest because of religious belief or opinion, Rule 610 bars it. The rule’s text is limited to credibility; it does not announce a general rule that religion is irrelevant for every possible noncredibility purpose.
Apply the distinctions in one item:
Dana testifies in a civil fraud action. Four years earlier, Dana was convicted of perjury, and proving the offense required proving that Dana made a material false statement under oath. Before that conviction, Dana falsely claimed on a job application that Dana had earned a college degree; the false claim produced no criminal charge or conviction. On cross-examination, Dana denies making the false claim. The opponent offers all proposed evidence solely to attack Dana’s character for truthfulness. Which two statements are correct?
(A) The perjury conviction must be admitted under Rule 609(a)(2), without ordinary Rule 403 balancing.
(B) The job-application lie may be asked about on cross-examination under Rule 608(b), but if Dana denies it, extrinsic evidence may not be offered solely to prove it.
(C) Because perjury is a felony, the conviction is governed only by Rule 609(a)(1) and must be balanced under Rule 403.
(D) The job-application lie is inadmissible because it did not result in a conviction.
(E) If Dana denies the lie, the opponent may call the former employer to prove it because the extrinsic-evidence bar applies only to criminal acts.
(F) Evidence that Dana is a committed member of a religion may be admitted to support Dana’s credibility.
Practice
Select the two answers that are correct.
| (A) The perjury conviction must be admitted under Rule 609(a)(2), without ordinary Rule 403 balancing. | (B) The job-application lie may be asked about on cross-examination under Rule 608(b), but if Dana denies it, extrinsic evidence may not be offered solely to prove it. | (C) Because perjury is a felony, the conviction is governed only by Rule 609(a)(1) and must be balanced under Rule 403. | (D) The job-application lie is inadmissible because it did not result in a conviction. | (E) If Dana denies the lie, the opponent may call the former employer to prove it because the extrinsic-evidence bar applies only to criminal acts. | (F) Evidence that Dana is a committed member of a religion may be admitted to support Dana’s credibility. | |
|---|---|---|---|---|---|---|
| Your answers |
Three Fast Applications: Bad Acts, Convictions, and Religion
Practice
During a civil contract trial, a witness is asked on cross whether she falsified mileage logs for a former employer. The act was never charged, and she denies it. Which is the most accurate ruling?
A defendant testifies in a criminal trial and has a three-year-old misdemeanor conviction for perjury. The conviction is on appeal. Which statement is correct?
A witness testifies that she believes her religion requires all people to be truthful. The lawyer offers that testimony solely to show the witness is credible. What result?
High-Yield Points - ⚡ Biggest Takeaways
Ask about a truthfulness-specific act only on cross, and accept the answer without extrinsic proof. Treat a conviction under Rule 609, not a nonconviction act under Rule 608(b). Keep religious belief and opinion out when offered to attack or support credibility.
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