Can You Introduce New Evidence on Appeal in Michigan?

Sometimes, the most important evidence is the evidence that you did not have when the trial ended. Maybe a witness appeared after the verdict. A critical document finally surfaced. Or a new fact emerged that could change how the entire case is understood.

And suddenly, you’re left with a difficult question: Can new evidence be introduced on appeal?

The answer is not as easy and straightforward as you may think. Michigan appellate courts usually limit their review to the record that was already created. That can make newly discovered evidence particularly frustrating, especially when it could have changed the result. But when the court says “not on the appellate record,” it does not always equate to “no legal remedy.”

Michigan law provides limited avenues for addressing evidence that could not have been presented earlier. Understanding how appeals work in the Michigan Court of Appeals can help explain why appellate courts generally review an existing record rather than hear new evidence themselves.

Mark Linton of Great Lakes Appellate Law, a well-established Michigan appellate attorney, explains what happens when new evidence surfaces and which procedural mechanisms may allow that evidence to be developed or considered.

Quick Answer

Generally, new evidence cannot simply be attached for the first time on appeal in Michigan. The Michigan Court of Appeals ordinarily reviews the existing trial court record rather than conducting a new evidentiary proceeding. However, in appropriate circumstances, the Court of Appeals may remand a case for additional evidence to be taken or permit amendments or additions to the record.

Why Michigan Appeals Usually Do Not Allow New Evidence

The appellate process serves a different purpose from a trial. A trial court is primarily responsible for finding facts, hearing witnesses, receiving evidence, resolving evidentiary disputes, and making factual findings.

An appellate court, on the other hand, generally reviews the trial court’s work. That is why the Michigan Court of Appeals ordinarily works from the record created by the trial court.

MCR 7.210 provides that appeals to the Court of Appeals are heard on the original record. In an appeal from a lower court, that record generally consists of the original papers filed in the case, transcripts of testimony and other proceedings, and exhibits introduced into evidence.

That means an appellant usually cannot wait until the appeal and then present evidence that was never given to the trial court.

For example, an appellant generally cannot simply attach the following materials to an appellate brief and ask the Court of Appeals to decide the case based on them:

• A new witness affidavit
• A newly obtained photograph
• A new expert report
• A medical record never presented below
• A new police report
• A text-message conversation
• A new scientific study
• A new piece of documentary evidence

To better understand, imagine a civil case in which the plaintiff loses at trial. After judgment, the plaintiff discovers an email that was never introduced into evidence.

The plaintiff generally cannot simply attach the email to the appellate brief and argue that the Court of Appeals should now consider it and reverse the trial court.

The trial judge never had an opportunity to examine the evidence, hear objections, determine its authenticity, evaluate its significance, or consider it when making the decision. That is precisely the kind of fact-finding an appellate court usually does not perform in a normal appeal.

Can the Michigan Court of Appeals Ever Consider New Evidence?

Yes. This is where MCR 7.216 becomes particularly important. MCR 7.216(A) gives the Court of Appeals discretionary powers in appropriate cases. Among other things, the court may:

• Permit amendments, corrections, or additions to the transcript or record
• Remand the case to allow additional evidence to be taken
• Draw inferences of fact
• Enter an appropriate judgment or order
• Grant further or different relief as the circumstances require

The rule therefore recognizes that unusual cases may require something beyond simply reviewing the existing record. But this does not mean that an appellant has a general right to introduce new evidence whenever something favorable is discovered after trial.

The Court of Appeals exercises these powers within the limits of appellate procedure and the circumstances of the particular case.

Remand Is Often the More Appropriate Path

Suppose a defendant discovers a witness after trial who claims to have information that could materially affect the verdict. The defendant generally should not expect the Court of Appeals to conduct a mini-trial inside the appeal.

Instead, the defendant may seek a remand to the trial court for an evidentiary hearing. This allows the trial court to do what trial courts are designed to do: hear witnesses, receive evidence, assess credibility, and make factual findings.

Trial courts are also designed to determine whether the evidence:

• Is genuinely new
• Could have been discovered earlier
• Could justify a new trial

Michigan appellate rules specifically recognize this mechanism. MCR 7.216(A)(5) provides that the Court of Appeals may remand a case to allow additional evidence to be taken.

MCR 7.211(C)(1) also addresses motions to remand. An appellant seeking remand for a hearing must support the motion with an affidavit or offer of proof concerning the facts that the party expects to establish.

That requirement matters. An appellate court generally will not order a fact-finding hearing based solely on a vague assertion that “new evidence exists.” The appellant must give the court a meaningful basis for determining whether further proceedings are warranted.

What Counts as “Newly Discovered Evidence”?

The phrase newly discovered evidence has a specific legal meaning. It does not simply mean “evidence I found after trial.”

Michigan courts have developed a four-part test for determining whether newly discovered evidence can justify a new trial. That test comes from People v. Cress (2003).

Under Cress, a defendant seeking a new trial based on newly discovered evidence generally must establish:

• The evidence itself, not merely its materiality, was newly discovered
• The evidence is not merely cumulative
• The party could not, using reasonable diligence, have discovered and produced the evidence at trial
• The new evidence makes a different result probable at trial

The Michigan Supreme Court reaffirmed and explained this framework in People v. Rao (2012). That means “new” has a much narrower meaning than many people assume.

You might have known about a witness before trial but chosen not to call that witness. The witness’s willingness to testify after trial does not automatically transform the testimony into newly discovered evidence.

Leading Michigan Cases on New Evidence and Appeals

The People v. Johnson (2018) Case

In this case, the Michigan Supreme Court again applied the Cress framework. It focused particularly on whether newly discovered evidence made a different result probable on retrial.

The case demonstrates that satisfying the “newness” and diligence requirements is not enough. The evidence must also have a meaningful potential to change the outcome.

The People v. Rogers (2020) Case

People v. Rogers, 335 Mich App 172 (2020), is particularly useful because it illustrates the procedural steps that may be available when new evidence appears during an appeal.

The Michigan Court of Appeals explained that a defendant whose claims were still on direct appeal could not simply file a standard post-conviction motion for relief from judgment. Instead, the defendant could seek permission from the appellate court to return to the trial court and pursue a motion for a new trial.

The case therefore demonstrates an important principle: when new evidence arises during an appeal, the answer may be a remand to the trial court rather than presentation of the evidence directly to the appellate judges.

The People v. Nelson (2014) Case

This case provides an example involving newly discovered evidence and additional appellate proceedings.

The case returned to the Court of Appeals following Michigan Supreme Court proceedings. The Court of Appeals considered additional issues involving newly discovered evidence and ultimately vacated the conviction and remanded for a new trial.

What If the New Evidence Is an Affidavit?

Affidavits are a common source of confusion. A person may discover a witness after trial and obtain a signed affidavit describing what that witness would have said.

The affidavit does not automatically become evidence that the Court of Appeals must consider. Michigan appellate decisions have repeatedly emphasized that parties generally cannot enlarge the appellate record simply by submitting affidavits together with appellate briefs.

Instead, the affidavit may be used to support a motion to remand for an evidentiary hearing. Under MCR 7.211(C)(1)(a), a motion for remand must generally be supported by an affidavit or offer of proof concerning the facts the party expects to establish at the hearing.

That is a very different procedural purpose. The affidavit may help demonstrate why a hearing is necessary without automatically becoming evidence that the appellate court uses to decide the merits.

What If a Witness Changes Their Story After Trial?

A witness recantation can present especially difficult issues. Michigan courts have traditionally treated recantation evidence with caution.

In People v. Barbara (1977), the Michigan Supreme Court recognized the traditional concern surrounding recantation testimony. A witness who changes testimony after a defendant has been convicted may provide important information.

But the court must also consider why the witness changed the story, whether the new account is credible, and whether it actually meets the legal requirements for a new trial.

The appellate court generally is not the ideal forum for making that credibility determination. That is another reason a remand for an evidentiary hearing may be appropriate in a case involving disputed new testimony.

What If the New Evidence Is Scientific Evidence?

Scientific evidence creates another important category. Suppose an expert testified at trial based on a particular scientific understanding and, years later, the scientific consensus changes.

That development may have implications far beyond an ordinary appellate argument. Michigan’s post-conviction rules specifically recognize certain forms of new scientific evidence.

Under MCR 6.502(G)(3), “new evidence” for purposes of the rule includes new scientific evidence. This can include changes in scientific consensus, changes in an expert’s scientific knowledge or opinions, and changes in the scientific method underlying relevant evidence presented at trial.

The Michigan Supreme Court’s decision in People v. Lemons (2024) is especially significant in this area. The Court considered new scientific evidence involving an expert’s changed understanding and ultimately granted a new trial.

This demonstrates why “new evidence” must be evaluated in context. A new scientific development may not simply be something to add to an appellate brief. It may trigger a separate post-conviction or remand procedure designed to determine whether the new science warrants relief.

What About Judicial Notice?

There is a limited category of information that courts may recognize without traditional evidentiary presentation. That category is judicial notice.

Under Michigan Rule of Evidence 201, courts may take judicial notice of certain adjudicative facts that are not subject to reasonable dispute. But judicial notice should not be confused with a general exception allowing parties to introduce new evidence on appeal.

If a party tries to use judicial notice to introduce disputed factual material that was never presented in the trial court, the request may fail.

The Sixth Circuit addressed a related issue in United States v. Bonds (6th Cir. 1994). It declined to consider a scientific report that had not been before the district court and rejected an attempt to use judicial notice as a way around the ordinary limits of the appellate record.

The principle is straightforward: judicial notice is not a back door for presenting disputed new evidence on appeal.

What If the Trial Court Refused to Admit Evidence?

If evidence was offered at trial but excluded, the appellate issue is generally whether the trial court made a reversible evidentiary error. This is where MRE 103 becomes important.

The standard of review in Michigan appeals can also affect how the Court of Appeals evaluates a trial court’s evidentiary ruling.

The appellate court can review the existing record to determine:

• What evidence was offered
• What objection was made
• Why the trial court excluded it
• Whether the party preserved the issue
• Whether the ruling affected a substantial right
• Whether reversal is warranted

The appellant is not necessarily asking the Court of Appeals to consider “new evidence.” Instead, the appellant is asking the court to review an existing evidentiary ruling. That is a conventional appellate issue.

What If the Evidence Was Accidentally Left Out of the Record?

That is a record problem, not necessarily a new evidence problem. Sometimes, the problem is not that the evidence is genuinely new. It is that the evidence was already part of the proceedings but was omitted from or misstated in the appellate record.

Michigan’s appellate rules give the Court of Appeals authority to correct or supplement the record in appropriate circumstances. MCR 7.216(A)(4) states that the Court may permit amendments, corrections, or additions to the transcript or record.

The goal in such circumstances is to ensure that the appellate court has an accurate record of what actually occurred in the trial court. That is very different from allowing a party to create an entirely new evidentiary record after losing at trial.

What Happens in a Federal Appeal in the Sixth Circuit?

The same fundamental principle applies in federal appeals. The United States Court of Appeals for the Sixth Circuit generally reviews the record created in the district court rather than conducting a new trial.

Federal Rule of Appellate Procedure 10 generally defines the record on appeal as the original papers and exhibits filed in the district court, the transcript of proceedings, and the certified docket entries.

FRAP 10(e) permits correction of omissions or misstatements in the record in appropriate circumstances. But it is not a general mechanism for introducing new evidence that was never considered by the district court.

The Sixth Circuit made this especially clear in Inland Bulk Transfer Co. v. Cummins Engine Co. (6th Cir. 2003). The court rejected an attempt to supplement the appellate record with documents that had never been considered by the district court.

The Sixth Circuit explained that Rule 10(e) is intended to correct omissions or misstatements in the existing record, not to introduce new evidence into the appellate record.

The court also emphasized the broader principle that an appellate court should generally have before it the record and facts considered by the lower court.

Evidence Can Be “Newly Available” Without Being “Newly Discovered”

Another useful Sixth Circuit case is United States v. Glover (6th Cir. 1994). Glover involved testimony that became available after trial from a witness who had previously been unavailable.

The Sixth Circuit distinguished between evidence that is genuinely newly discovered and evidence that was merely newly available. That distinction closely parallels the Michigan Supreme Court’s reasoning in People v. Rao.

The lesson is that a witness becoming willing or able to testify after trial does not automatically make the testimony newly discovered evidence.

The court may ask whether the evidence itself was unknown or whether the party simply failed to obtain available evidence earlier.

Can New Evidence Change the Outcome of an Appeal?

Yes, but usually indirectly. New evidence may lead the Court of Appeals to remand the case, order an evidentiary hearing, or permit appropriate development of the record.

It may also lead the court to direct the trial court to consider the evidence, order a new trial, or grant another form of relief. But the existence of new evidence does not automatically mean the appellate court will reverse the judgment.

The evidence must fit within the applicable legal framework. In a criminal case involving a request for a new trial based on newly discovered evidence, for example, the Cress requirements remain central.

The question is not merely whether the evidence is interesting or potentially helpful. It is whether it satisfies the legal requirements for disturbing the finality of the judgment. Understanding what appellate judges look for when reviewing a Michigan case can provide additional context for how appellate courts evaluate the record and claimed errors.

Further Reading

• How the Michigan Civil Appeal Process Works in the Court of Appeals
• Claim of Appeal vs. Application for Leave in Michigan — What’s the Difference?
• How Long Does a Michigan Appeal Take?
• Federal vs. State Appeals: Understanding the Differences in Michigan
• Sixth Circuit Appeal: How Lawyers Evaluate Whether Your Case Is Viable

Frequently Asked Questions About New Evidence on Appeal

What if my lawyer knew about the evidence but did not use it?

That can make a newly discovered evidence claim much more difficult. Under the principles discussed in People v. Rao, evidence known to the defendant or counsel before trial generally cannot be characterized as newly discovered simply because it was not introduced.

Depending on the circumstances, however, the failure to investigate or present evidence may raise a separate ineffective assistance of counsel issue.

Can the other side object to my new evidence on appeal?

Yes. The opposing party can challenge whether the material belongs in the appellate record. They can also challenge whether the evidence is genuinely new, whether it could have been discovered earlier, whether it is admissible, and whether it justifies a remand or other relief.

What if the new evidence was created after the trial?

Evidence that literally did not exist at the time of trial may present a stronger argument that it is genuinely new. But that does not automatically mean the appellate court will consider it directly. The nature of the evidence and the legal relief being sought still determine the appropriate procedure.

Can I use evidence that was excluded at trial?

Potentially, yes. But that is different from introducing genuinely new evidence. If the evidence was offered at trial and excluded, the appellate issue generally concerns whether the court committed reversible error in excluding it. Preservation requirements, including those in MRE 103, can be important.

What if evidence was admitted at trial, but the judge misunderstood it?

That can also present a conventional appellate issue. The Court of Appeals can review the trial court’s treatment of evidence that is already part of the record, subject to the applicable standard of review.

Can I introduce evidence that became available because of a new scientific discovery?

Possibly. But the appropriate procedure may involve new-trial or post-conviction proceedings rather than simply attaching the scientific material to an appellate brief. Michigan’s post-conviction rules specifically recognize certain forms of new scientific evidence.

Can new evidence make an appeal take longer?

Yes. If the Court of Appeals determines that further factual development is necessary, it may remand the case for an evidentiary hearing or additional proceedings. That can add another stage to the litigation before the appellate court can resolve the case.

If you have questions about new evidence on appeal, the Michigan Court of Appeals, evidentiary errors, remand procedures, or whether evidence discovered after trial could affect your appeal, visit our Common Appeals Questions Knowledge Center for additional guidance.

When the Evidence Changes, Don’t Let the Opportunity Pass You By

Your case’s verdict may already be in, but the story may not be over. If evidence has surfaced that could change what happened in your case, knowing how to get that evidence before the court can matter as much as the evidence itself.

Don’t leave a potentially case-changing discovery to chance. Great Lakes Appellate Law’s Michigan and federal appeals lawyers can help you understand your options and determine whether Michigan appellate law provides a path forward.

Finding the evidence is only half the battle. Knowing what to do with it is the other half.

Have Questions About New Evidence on Appeal?

New evidence does not automatically become part of a Michigan appeal. Whether it can affect the case may depend on when the evidence was discovered, whether it could have been found earlier, what the existing record contains, and whether a remand, evidentiary hearing, new-trial motion, or other procedure may be appropriate.

At Great Lakes Appellate Law, Mark Linton helps clients evaluate appellate records, identify potentially significant new evidence, understand Michigan appellate procedure, and determine what options may remain.

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