Interlocutory Appeals

Interlocutory Appeals and the Collateral Order Doctrine in Federal Criminal Cases

In the federal criminal justice system, defendants generally must wait until a case is fully resolved before filing an appeal.

This means appeals usually occur only after a final judgment, such as a conviction and sentencing. 

However, in rare circumstances, a defendant may seek review of a specific ruling before the case concludes.

These limited appeals, known as interlocutory appeals, are governed primarily by the collateral order doctrine.

Because interlocutory appeals interrupt ongoing proceedings, federal courts treat them as extraordinary remedies.

Understanding when they are permitted and how they function is critical for defendants facing high-stakes rulings during litigation. Our California federal criminal defense lawyers will provide an overview below.

What Is an Interlocutory Appeal?

An interlocutory appeal is an appeal of a non-final court order issued during the course of a criminal or civil case. The word “interlocutory” refers to the temporary or intermediate nature of the ruling being challenged.

Unlike traditional federal appeals, which challenge a conviction or sentence after the case ends, interlocutory appeals seek immediate review of a specific ruling that may significantly affect the case if left unaddressed.

In criminal cases, these appeals are extremely uncommon and are allowed only in narrow circumstances.

Federal courts strongly favor resolving all issues in a single appeal after final judgment. As a result, most rulings issued during trial—such as evidentiary decisions or procedural determinations—are not immediately appealable.

Why Interlocutory Appeals Are Rare in Criminal Cases

In federal criminal prosecutions, defendants typically cannot appeal until the court enters a final judgment of conviction. This rule promotes judicial efficiency and prevents repeated interruptions of trials.

Courts generally deny interlocutory appeals because:

• Most trial rulings can be reviewed after conviction

• Delays undermine the efficient administration of justice

• Appeals courts prefer to review cases with complete records

As a result, interlocutory appeals are permitted only when waiting for final judgment would effectively deprive the defendant of meaningful appellate review.

The Collateral Order Doctrine Explained

The collateral order doctrine is a narrow exception to the general rule that only final judgments may be appealed. It allows immediate appeal of certain orders that are considered separate from the merits of the case and incapable of effective review later.

To qualify under the collateral order doctrine, a ruling must meet all three of the following requirements:

1. Conclusive Determination
   The order must conclusively resolve the disputed legal issue.

2. Separate from the Merits
   The issue must be entirely independent of the defendant's guilt or innocence.

3. Effectively Unreviewable After Final Judgment
   The harm caused by the ruling cannot be remedied on appeal after conviction.

If any one of these criteria is not met, the appellate court will dismiss the appeal for lack of jurisdiction.

Common Examples of Issues Raised in Interlocutory Appeals

Although rare, interlocutory appeals may arise in limited criminal contexts, such as:

• Denials of motions to dismiss based on double jeopardy

• Orders compelling disclosure of privileged information

• Certain qualified immunity rulings

• Orders affecting constitutional protections that would be lost if the case proceeds

Routine trial rulings—such as evidentiary decisions or suppression motions—almost never qualify.

Example of an Interlocutory Appeal in Practice

Consider a defendant charged with multiple counts of federal fraud. Before trial, defense counsel files a motion to suppress evidence obtained in violation of the Fourth Amendment.

The trial court denies the motion and allows the evidence to be used.

Although this ruling is harmful, it typically does not qualify for interlocutory appeal. The defendant must proceed to trial and raise the issue on appeal after conviction.

However, if the ruling involved disclosure of attorney-client privileged material or implicated a right that would be permanently lost if the trial continued, an interlocutory appeal under the collateral order doctrine might be possible.

Filing Requirements and Timing in Federal Appeals

For standard criminal appeals, a defendant must file a notice of appeal within 14 days of the final judgment. Missing this deadline can permanently forfeit appellate rights.

Interlocutory appeals involve additional procedural hurdles. In many cases:

• The trial court must certify the issue for appeal

• The appellate court must independently agree to hear the appeal

• The defendant must demonstrate that the delay is justified

Because of these complexities, interlocutory appeals require careful strategic evaluation.

Practical Considerations Before Filing an Interlocutory Appeal

Before pursuing an interlocutory appeal, defendants should consider:

• Likelihood of success: Most are dismissed for lack of jurisdiction

• Delay risks: Appeals pause proceedings and may extend detention

• Strategic impact: An unsuccessful appeal may strengthen the prosecution's position

Only experienced federal defense counsel can determine whether an interlocutory appeal serves the defendant's best interests.

Why Legal Representation Matters

Interlocutory appeals and the collateral order doctrine involve complex jurisdictional rules and constitutional analysis. Filing an improper appeal can waste resources, delay resolution, and potentially harm the defense.

An experienced federal criminal defense attorney can:

• Identify appealable collateral orders

• Preserve appellate rights

• Navigate strict filing deadlines

• Develop long-term litigation and appellate strategy

Speak With a Federal Criminal Defense Attorney

If you are involved in a federal criminal case and believe a critical ruling threatens your constitutional rights, legal guidance is essential. Not every adverse ruling is appealable, but some may warrant immediate review.

Contact Eisner Gorin LLP, a federal criminal defense law firm based in Los Angeles, California, at 818-781-1570 for a confidential case evaluation and strategic guidance regarding trial and appellate options.

Related Content:

• Appellate Procedure
• Eighth Amendment