Grounds for Federal Criminal Appeals in Los Angeles

September 15, 2026
Grounds for Federal Criminal Appeals in Los Angeles

A conviction or sentence in federal court can feel like the end of the road, but it does not have to be. If a legal error occurred during your case, you may have the right to challenge the outcome by filing a federal appeal. However, simply being unhappy with the result is not enough. You need to identify a specific legal basis that allows a higher court to review what happened.

Determining what qualifies as a valid basis for appeal is an important first step. Federal appellate courts do not retry cases or hear the evidence from scratch. Instead, they review the existing record to determine whether the district court made an error that warrants relief. Read on to learn about common grounds for federal criminal appeals.

How a Federal Appeal Works

How a Federal Appeal Works

A federal appeal is a rigorous review of the district court record, not a retrial with new evidence or witnesses. The process begins with a strict 14-day window to file a notice of appeal following a judgment. From there, the appellate court evaluates the case through detailed written briefs and, in select instances, oral arguments to determine if a legal error warrants relief.

For federal criminal cases originating in Los Angeles, appeals from the U.S. District Court for the Central District of California generally go to the U.S. Court of Appeals for the Ninth Circuit.

The issues raised in the appeal are critical. The applicable standard of review can also depend on what type of ruling is challenged and whether the defense properly raised the issue in the district court.

Common Grounds for a Federal Appeal

Several types of legal errors can support a federal criminal appeal. Whether an error ultimately justifies relief depends on the circumstances and the standard the appellate court applies.

Errors of Law

One frequently raised issue is that the district court incorrectly applied or interpreted the law. This can take many forms, such as flawed jury instructions, errors in calculating or applying the federal Sentencing Guidelines, or an incorrect ruling on a pretrial motion.

If the legal error affected the proceedings in a way that meets the applicable standard for relief, the appellate court may reverse, remand, or order another appropriate remedy.

Constitutional Violations

The Constitution guarantees important rights to defendants in federal criminal cases. A violation of those rights can sometimes provide grounds for an appeal. A constitutional violation does not automatically result in reversal. The appellate court must consider the nature of the violation and the legal standard that applies.

Insufficient Evidence

A federal conviction must be supported by evidence sufficient to establish guilt beyond a reasonable doubt. If the prosecution failed to meet that standard, a defendant may challenge the sufficiency of the evidence on appeal.

When reviewing such a claim, the appellate court generally considers whether, viewing the evidence in the light most favorable to the prosecution, any rational factfinder could have found the essential elements of the offense beyond a reasonable doubt.

Ineffective Assistance of Counsel

The Sixth Amendment guarantees a defendant the right to effective assistance of counsel. A claim generally requires showing that the attorney’s performance fell below an objective standard of reasonableness and that the deficient performance caused prejudice.

However, ineffective-assistance claims are often not decided on direct appeal because the trial record may not contain enough information to evaluate why counsel acted as they did. In federal cases, these claims are commonly raised through a motion under 28 U.S.C. § 2255, although a direct appeal may address the issue in some circumstances when the record is sufficiently developed.

Abuse of Discretion

Trial judges have discretion to make many decisions throughout a case, but that discretion has limits. An appellate court may find an abuse of discretion when a decision falls outside the range permitted by the applicable law and facts.

This standard can apply to certain evidentiary rulings and other decisions the district court makes while managing a case.

Prosecutorial Misconduct

Improper conduct by federal prosecutors can sometimes provide a basis for appellate relief if it affected the defendant’s rights or the fairness of the proceedings.

Examples can include withholding material evidence favorable to the defense or making improper statements to the jury. Whether misconduct warrants relief depends on what occurred and how it affected the case.

Harmless Error vs. Reversible Error

Not every mistake made in district court leads to a successful appeal. Federal courts distinguish between errors that require relief and errors that are considered harmless.

A harmless error is one that does not justify disturbing the judgment under the applicable legal standard. Depending on the type of error involved, an error that affected the defendant’s substantial rights may lead to reversal, resentencing, a new hearing, or another remedy.

Preserved Errors and Plain Error

Whether the defense objected to an issue in the district court can make a major difference on appeal. When an issue was properly preserved, the appellate court applied the appropriate standard of review.

When no timely objection was made, some claims may be reviewed only for plain error. Plain-error review is more demanding and generally requires the defendant to satisfy additional requirements before an appellate court will grant relief.

Contact the Federal Criminal Appeals Lawyers at Perlman Defense Federal Criminal Lawyers for a Free Consultation Today

If you or a loved one has been convicted or sentenced in a federal criminal case in Los Angeles, CA, an appeal may be available depending on what happened in the district court. Appeal deadlines can be short, and the issues raised may depend on the trial record, preserved objections, sentencing proceedings, and other details of the case.

For more information, contact Perlman Defense Federal Criminal Lawyers at (747) 373-0477 to schedule a free consultation today.

Daniel Perlman
CRIMINAL DEFENSE ATTORNEY

Daniel R. Perlman, the founding attorney at Perlman Defense Federal Criminal Lawyers, leverages his extensive background as a former prosecutor to provide superior defense strategies for clients across federal courtrooms. Earning his Juris Doctor from the Catholic University of America's Columbus School of Law, he first honed his legal skills with the Maryland State’s Attorney’s Office. 

This diverse experience enables him to advocate effectively, understanding prosecution tactics intimately, which he expertly counters in defense of his clients. With a profound commitment to justice, Daniel leads his team in tackling complex federal cases, from white-collar crimes to violent offenses, ensuring the highest level of defense through every phase of the criminal process.

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