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Expert Witness Guides
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The Missing Witness Rule may allow a jury to draw an adverse inference when a party fails to call a witness who was practically available, likely to provide material non-cumulative testimony, and absent without a persuasive explanation. This article explains how courts evaluate the inference, how attorneys can build or challenge the required foundation, and the additional considerations that arise with expert witnesses and criminal cases.
In trial, silence can be as telling as testimony. When a party does not call a witness who seems central to the story, judges and jurors naturally wonder what that witness would have said.
The Missing Witness Rule is commonly discussed as an adverse inference concept tied to a party’s choice not to present a witness. In the right situation, it can support an argument that the jury may infer the missing testimony would have been unfavorable to the party who did not call the witness.
This guide explains how the Missing Witness Rule works in practice, when it may apply, and how to build or defeat the foundation needed for a permissible inference.
At its core, the doctrine describes when a jury may be permitted to draw an adverse inference from a witness’s absence.
A classic statement is often traced to Graves v. United States. In the passage lawyers frequently cite, the Court explains that when a party has it “peculiarly within his power” to produce a witness whose testimony would clarify the transaction, failure to do so “creates the presumption” that the testimony would be unfavorable. Graves also limits the presumption, noting it does not apply to every fact in the case it may be in the defendant’s power to prove, and that a defendant is not required to anticipate every point the government may try to establish. The case is also a reminder that context matters. It is a criminal decision, and the Court’s ruling turns on the wife’s incompetency as a witness and the unfair inference invited by the prosecutor’s comment.
Modern instructions and evidence guides often frame the concept in permissive terms. That means the jury may draw an adverse inference if the required conditions are met. The inference is permitted, not required.
Some jurisdictions regulate missing-witness arguments tightly. For example, Massachusetts requires judicial approval before counsel may make the argument, and it links permission to argue to whether the court will give the instruction.
Some model instructions are written for criminal cases and focus on whether a witness was practically available to the government but not the defense, so it helps to read each forum’s language closely before relying on it. For example, the District of Massachusetts pattern instruction is written with missing government witnesses in mind and cautions judges to be careful about using the instruction against a defendant.
Two practical points matter most:
In trial, silence can be as telling as testimony. When a party does not call a witness who seems central to the story, judges and jurors naturally wonder what that witness would have said.
The Missing Witness Rule is commonly discussed as an adverse inference concept tied to a party’s choice not to present a witness. In the right situation, it can support an argument that the jury may infer the missing testimony would have been unfavorable to the party who did not call the witness.
This guide explains how the Missing Witness Rule works in practice, when it may apply, and how to build or defeat the foundation needed for a permissible inference.
At its core, the doctrine describes when a jury may be permitted to draw an adverse inference from a witness’s absence.
A classic statement is often traced to Graves v. United States. In the passage lawyers frequently cite, the Court explains that when a party has it “peculiarly within his power” to produce a witness whose testimony would clarify the transaction, failure to do so “creates the presumption” that the testimony would be unfavorable. Graves also limits the presumption, noting it does not apply to every fact in the case it may be in the defendant’s power to prove, and that a defendant is not required to anticipate every point the government may try to establish. The case is also a reminder that context matters. It is a criminal decision, and the Court’s ruling turns on the wife’s incompetency as a witness and the unfair inference invited by the prosecutor’s comment.
Modern instructions and evidence guides often frame the concept in permissive terms. That means the jury may draw an adverse inference if the required conditions are met. The inference is permitted, not required.
Some jurisdictions regulate missing-witness arguments tightly. For example, Massachusetts requires judicial approval before counsel may make the argument, and it links permission to argue to whether the court will give the instruction.
Some model instructions are written for criminal cases and focus on whether a witness was practically available to the government but not the defense, so it helps to read each forum’s language closely before relying on it. For example, the District of Massachusetts pattern instruction is written with missing government witnesses in mind and cautions judges to be careful about using the instruction against a defendant.
Two practical points matter most:
There is no single checklist that applies everywhere. Even so, the issues that come up most often tend to overlap. The heart of the dispute is usually whether the witness was practically available to one side, whether the missing testimony would matter, and whether there is a legitimate explanation for the absence.
The patterns below track how several widely used instructions and evidence guides frame the doctrine, including the focus on practical availability and whether the missing testimony would be material and non-cumulative.
Many instruction frameworks focus on whether the witness was “peculiarly within the power” of one party, or otherwise practically available to one side and not the other.
In real cases, lawyers often prove this with simple, record-based facts: the relationship between the witness and a party, the witness’s alignment, and whether the witness was realistically available to testify for one side, depending on the forum’s approach.
Some frameworks also ask whether the witness was friendly, or at least not hostile, to the party who did not call them, not just whether the witness could be found.
Model instructions often focus on whether the missing witness would have offered important testimony that is not just repetitive. If the testimony would simply repeat what the jury already heard, the inference is not justified.
A simple way to keep this clear is to define the “gap” in one sentence. What specific disputed point would this witness address that the jury has not already heard?
Some instruction frameworks explicitly account for whether there is an explanation for the witness’s absence. The District of Massachusetts pattern instruction also emphasizes that the court should consider any explanation for the absence and whether the witness would likely offer relevant, non-cumulative testimony.
As a practical matter, explanations can range from a witness lacking relevant knowledge to genuine availability problems or other case-specific constraints. The key is whether there is a logical explanation, grounded in the record, for why the witness was not called.
A missing-witness inference asks the jury to reason about evidence it did not hear. That is why instructions and evidence guidance set strict conditions and emphasize that the inference is allowed only in limited circumstances and only when it is a natural and reasonable inference from the record.
Some model-instruction comments caution that, in many trials, this issue is better handled through counsel’s argument unless the prerequisites are clearly met.
That framing also gives litigators a practical takeaway: the closer your request looks like speculation, the less likely it is to survive.
If you want to use this doctrine, the work starts long before closing. The strongest requests are the ones that build a clean record on the same elements the instructions talk about: practical availability, materiality, and whether the testimony would be cumulative.
If you see a missing-witness argument coming, your goal is to show the request does not satisfy the elements.
A practical defense move is to force the proponent to be specific. What is the one missing point? Why is this witness not equally available? What is the evidentiary basis for those assertions?
It can in some contexts, but expert issues often intersect with separate discovery rules, so the analysis is highly record- and forum-dependent.
In federal cases, a key distinction is between testifying experts and consulting experts. Rule 26(b)(4)(D) generally bars a party from using interrogatories or depositions to discover facts known or opinions held by a non-testifying expert retained for trial preparation, unless an exception applies, including “exceptional circumstances.”
That rule does not, by itself, answer whether a missing-witness inference should be permitted. But it does help explain why “missing expert” themes can become complicated fast. In practice, it can get messy because the jury may be invited to speculate about consulting work that the rules largely protect from discovery. That is an interpretation based on how Rule 26 protects consulting experts, not a universal rule.
If you are litigating a missing-witness issue involving experts, the safest approach is to stay anchored to what is actually in the record. What experts were disclosed to testify? What opinions were admitted? What is the concrete gap the jury is being asked to fill?
A missing-witness concept can arise in criminal cases, but constitutional limits apply.
In criminal cases, Griffin v. California bars the prosecution from commenting on the accused’s silence, and it bars the court from instructing the jury that silence is evidence of guilt. That rule applies in state criminal trials through the Fourteenth Amendment.
Beyond that, criminal model instructions reflect that adverse-inference ideas are allowed only in limited circumstances and only when the inference is natural and reasonable based on the record.
One caution is that some model instructions, like the Ninth Circuit’s § 4.13, are written for very specific fact patterns, so you should not assume their wording carries over unchanged to every criminal case.
Can I get the instruction just because the other side “could have” called the witness?
Usually not. Many instruction frameworks look for more than theoretical subpoena power and focus on practical availability. Where a witness is equally available, the inference is often rejected.
What if the witness is equally available to both parties?
Some instructions state that no inference is justified if the witness is equally available to both sides.
What makes an inference “reasonable” instead of speculative?
Model instructions emphasize that the inference must be natural and reasonable in light of the evidence, and that it is appropriate only in limited circumstances.
What is the cleanest way to defeat a missing-witness request?
Focus on the elements the instructions highlight and show the foundation is missing, such as equal availability, cumulativeness, and whether the witness would provide important new testimony.
There is no single checklist that applies everywhere. Even so, the issues that come up most often tend to overlap. The heart of the dispute is usually whether the witness was practically available to one side, whether the missing testimony would matter, and whether there is a legitimate explanation for the absence.
The patterns below track how several widely used instructions and evidence guides frame the doctrine, including the focus on practical availability and whether the missing testimony would be material and non-cumulative.
Many instruction frameworks focus on whether the witness was “peculiarly within the power” of one party, or otherwise practically available to one side and not the other.
In real cases, lawyers often prove this with simple, record-based facts: the relationship between the witness and a party, the witness’s alignment, and whether the witness was realistically available to testify for one side, depending on the forum’s approach.
Some frameworks also ask whether the witness was friendly, or at least not hostile, to the party who did not call them, not just whether the witness could be found.
Model instructions often focus on whether the missing witness would have offered important testimony that is not just repetitive. If the testimony would simply repeat what the jury already heard, the inference is not justified.
A simple way to keep this clear is to define the “gap” in one sentence. What specific disputed point would this witness address that the jury has not already heard?
Some instruction frameworks explicitly account for whether there is an explanation for the witness’s absence. The District of Massachusetts pattern instruction also emphasizes that the court should consider any explanation for the absence and whether the witness would likely offer relevant, non-cumulative testimony.
As a practical matter, explanations can range from a witness lacking relevant knowledge to genuine availability problems or other case-specific constraints. The key is whether there is a logical explanation, grounded in the record, for why the witness was not called.
A missing-witness inference asks the jury to reason about evidence it did not hear. That is why instructions and evidence guidance set strict conditions and emphasize that the inference is allowed only in limited circumstances and only when it is a natural and reasonable inference from the record.
Some model-instruction comments caution that, in many trials, this issue is better handled through counsel’s argument unless the prerequisites are clearly met.
That framing also gives litigators a practical takeaway: the closer your request looks like speculation, the less likely it is to survive.
If you want to use this doctrine, the work starts long before closing. The strongest requests are the ones that build a clean record on the same elements the instructions talk about: practical availability, materiality, and whether the testimony would be cumulative.
If you see a missing-witness argument coming, your goal is to show the request does not satisfy the elements.
A practical defense move is to force the proponent to be specific. What is the one missing point? Why is this witness not equally available? What is the evidentiary basis for those assertions?
It can in some contexts, but expert issues often intersect with separate discovery rules, so the analysis is highly record- and forum-dependent.
In federal cases, a key distinction is between testifying experts and consulting experts. Rule 26(b)(4)(D) generally bars a party from using interrogatories or depositions to discover facts known or opinions held by a non-testifying expert retained for trial preparation, unless an exception applies, including “exceptional circumstances.”
That rule does not, by itself, answer whether a missing-witness inference should be permitted. But it does help explain why “missing expert” themes can become complicated fast. In practice, it can get messy because the jury may be invited to speculate about consulting work that the rules largely protect from discovery. That is an interpretation based on how Rule 26 protects consulting experts, not a universal rule.
If you are litigating a missing-witness issue involving experts, the safest approach is to stay anchored to what is actually in the record. What experts were disclosed to testify? What opinions were admitted? What is the concrete gap the jury is being asked to fill?
A missing-witness concept can arise in criminal cases, but constitutional limits apply.
In criminal cases, Griffin v. California bars the prosecution from commenting on the accused’s silence, and it bars the court from instructing the jury that silence is evidence of guilt. That rule applies in state criminal trials through the Fourteenth Amendment.
Beyond that, criminal model instructions reflect that adverse-inference ideas are allowed only in limited circumstances and only when the inference is natural and reasonable based on the record.
One caution is that some model instructions, like the Ninth Circuit’s § 4.13, are written for very specific fact patterns, so you should not assume their wording carries over unchanged to every criminal case.
Can I get the instruction just because the other side “could have” called the witness?
Usually not. Many instruction frameworks look for more than theoretical subpoena power and focus on practical availability. Where a witness is equally available, the inference is often rejected.
What if the witness is equally available to both parties?
Some instructions state that no inference is justified if the witness is equally available to both sides.
What makes an inference “reasonable” instead of speculative?
Model instructions emphasize that the inference must be natural and reasonable in light of the evidence, and that it is appropriate only in limited circumstances.
What is the cleanest way to defeat a missing-witness request?
Focus on the elements the instructions highlight and show the foundation is missing, such as equal availability, cumulativeness, and whether the witness would provide important new testimony.
Expert Witness Guides
Expert Witness Guides