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What Does a Federal Defense Attorney Do?
Written By KN Law Firm Editorial Team.
Reviewed by Chris Nalchajian, Criminal Defense Attorney.
Published: March 21, 2026 | Last Reviewed: March 2026
If you’ve been contacted by the FBI, received a federal grand jury subpoena, or learned that you’re under investigation by a federal agency, you’re likely experiencing a level of fear and confusion that few situations in life can match. Federal charges are not the same as state charges — and the attorney you hire to defend you is not interchangeable with just any criminal defense lawyer. The stakes are higher, the procedures are more complex, and the consequences of a conviction can be devastating and long-lasting.
At KN Law Firm, APLC, we represent clients facing federal criminal charges in Glendale, Los Angeles, and throughout Southern California. In this article, we break down exactly what a federal defense attorney does, why their role is so different from a state-level criminal lawyer, and what you should look for when choosing someone to defend your freedom in federal court.
Federal vs. State Charges: Why the Difference Matters
Before understanding what a federal defense attorney does, it’s essential to understand why federal charges are categorically different from state charges.
State crimes — like DUI, assault, or robbery — are prosecuted by the Los Angeles County District Attorney’s office and heard in California Superior Court. Federal crimes are prosecuted by the United States Attorney’s Office and heard in the U.S. District Court for the Central District of California, which covers Los Angeles, Orange, Riverside, San Bernardino, San Luis Obispo, Santa Barbara, and Ventura counties.
The differences go far beyond the courtroom location:
- Investigative resources: Federal agencies such as the FBI, DEA, IRS Criminal Investigation Division, and Homeland Security Investigations have virtually unlimited investigative resources. By the time federal charges are filed, the government has often been building a case for months — sometimes years.
- Sentencing guidelines: Federal convictions are governed by the U.S. Sentencing Guidelines (USSG), a complex point-based system that can dramatically increase prison time. Unlike California state court, federal judges operate within mandatory guideline ranges in most cases.
- Conviction rates: Federal prosecutors have some of the highest conviction rates in the American legal system — often exceeding 90 percent. This is not the place to go with underprepared representation.
- No early release: Federal prisoners must serve at least 85 percent of their sentence. There is no California-style “good time” credit that leads to early parole.
Understanding this landscape is step one. Hiring an attorney who truly understands it is step two.
Key Roles and Responsibilities of a Federal Defense Attorney
A federal criminal defense attorney does far more than show up to court and argue your case. Their work begins the moment you retain them — often before any charges have even been formally filed.
Investigating the Federal Case
When you hire a federal defense attorney, one of their first priorities is conducting an independent investigation of the government’s case. This includes reviewing search warrants and wiretap orders for constitutional deficiencies, interviewing witnesses before the government locks down their testimony, and identifying any violations of your Fourth, Fifth, or Sixth Amendment rights that could result in evidence being suppressed.
Federal agencies like the FBI and DEA don’t make many procedural mistakes — but when they do, an experienced attorney knows how to find them.
Challenging Evidence and Procedure
Your attorney will carefully scrutinize every piece of evidence the government intends to use against you. This includes challenging:
- The legality of the search that produced the evidence
- The chain of custody for physical evidence
- The admissibility of statements made during questioning
- The reliability of informant testimony
- Digital evidence and how it was obtained and preserved
Under the Federal Rules of Criminal Procedure, there are strict requirements governing how evidence must be gathered and disclosed. Violations of those rules can be powerful weapons in your defense.
Negotiating with Federal Prosecutors
Contrary to what many people assume, a significant number of federal cases are resolved through plea negotiations rather than trial. A skilled federal defense attorney knows how to approach Assistant U.S. Attorneys strategically — presenting facts, legal arguments, and mitigating circumstances that can lead to reduced charges or a more favorable sentencing recommendation.
This is especially important in cases involving the U.S. Sentencing Guidelines, where even a one or two-level reduction in the offense level can mean years off a sentence.
Advising on Federal Sentencing Guidelines
Even if a client ultimately pleads guilty, the work of a federal defense attorney is far from over. The USSG calculation process involves analyzing dozens of factors — criminal history, the nature of the offense, the defendant’s role, acceptance of responsibility, and more. An attorney who understands how to argue for downward departures or variances can make a meaningful difference in the final sentence imposed by the court.
Representing Clients Before the U.S. District Court, Central District of California
For clients in the greater Los Angeles area — including Glendale, Burbank, Pasadena, and the broader San Fernando Valley — federal criminal cases are heard in the U.S. District Court for the Central District of California. This court operates out of the Edward R. Roybal Federal Building and United States Courthouse in downtown Los Angeles, and it is one of the busiest federal courts in the country.
Practicing in this court requires more than just a California bar license. Federal court practice demands familiarity with the Local Criminal Rules of the Central District, the court’s standing orders, and the protocols expected by federal judges. Attorneys who primarily practice in Los Angeles County Superior Court or Burbank’s state courts may not have the same depth of experience in the federal system.
At KN Law Firm, APLC, federal court practice is a core part of what we do. We are familiar with the procedures, the expectations, and the realities of litigating in the Central District — and we use that knowledge to benefit every client we represent.
What to Expect During a Federal Criminal Case
One of the most common questions clients ask is: What actually happens after federal charges are filed? The process is structured and often moves quickly. Here is a general breakdown.
The Investigation Phase
Many federal cases begin long before any arrest. If federal agents are investigating you, you may be contacted for an interview, receive a target letter, or find that your financial records, emails, or business documents have been subpoenaed. This is the most critical phase to have an attorney — what you say (or don’t say) during an investigation can shape the entire trajectory of the case.
Grand Jury and Indictment
Federal prosecutors use grand juries to formally charge defendants with felonies. Grand jury proceedings are secret, and you are not entitled to have an attorney present in the grand jury room — but you absolutely should have one advising you before and after any grand jury appearance. An indictment from a federal grand jury formally triggers the case.
Arraignment and Pre-Trial Motions
After an indictment, you will be arraigned — meaning you will enter a formal plea before a federal magistrate or district judge. The pre-trial phase that follows is where your attorney will file motions to suppress evidence, challenge the sufficiency of the indictment, and otherwise shape the playing field before any trial begins.
Trial and Sentencing
Federal trials are conducted before U.S. District Judges and involve a 12-person jury. If convicted, sentencing follows — typically 6 to 8 weeks later — after the U.S. Probation Office prepares a Pre-Sentence Report (PSR). The PSR is a crucial document, and your attorney should review it in detail and file objections where appropriate before sentencing.
Federal Defense Attorney vs. Federal Public Defender
If you cannot afford a private attorney, you have the right to have a Federal Public Defender appointed to represent you at no charge. Federal Public Defenders are experienced, dedicated attorneys — but they carry extremely heavy caseloads. Depending on the complexity of your case, the time and resources they can dedicate to your defense may be limited.
A private federal defense attorney can devote significantly more time to your case, conduct independent investigation, retain expert witnesses, and provide the kind of individualized attention that complex federal matters require. For clients in the Glendale and Los Angeles area, the choice of representation can have a direct and lasting impact on the outcome.
Why Experience in Federal Court Matters
The federal criminal justice system rewards preparation, precision, and deep familiarity with the rules that govern it. A defense attorney who has handled dozens of federal cases in the Central District understands the unwritten dynamics of the courtroom — the preferences of individual judges, the tendencies of the U.S. Attorney’s office, and the procedural nuances that can make or break a motion or a negotiation.
At KN Law Firm, APLC, founding attorney Chris Nalchajian brings both formal training in criminal law and hands-on experience in federal and state matters across Southern California. He approaches every federal case the same way he approaches every other legal challenge: with meticulous preparation, an eye for the details that matter, and an unwavering commitment to his clients’ best interests.
If you or someone you love is facing federal criminal charges — whether in Glendale, Los Angeles, Pasadena, the San Fernando Valley, or anywhere in Southern California — the time to act is now. Federal investigations and prosecutions move fast, and early intervention by a skilled attorney can make a critical difference.
Call KN Law Firm, APLC today for a free confidential consultation: (888) 950-0011. We are located at 500 N Central Ave #650, Glendale, CA 91203, and we serve clients throughout Los Angeles County and surrounding areas.
Frequently Asked Questions (FAQ)
A federal defense attorney is specifically experienced in federal criminal procedure, the U.S. Sentencing Guidelines, and the rules and culture of the U.S. District Court. Not all criminal defense attorneys practice in federal court, which operates under an entirely different set of rules and standards than California state courts.
As soon as possible — ideally before you are charged. If you’ve been contacted by a federal agent, received a target letter, been subpoenaed to testify before a grand jury, or learned that you are under federal investigation, you should consult with a federal defense attorney immediately. Early representation can protect your rights and potentially influence the direction of the investigation.
Federal defense attorneys handle cases involving federal crimes, including drug trafficking, wire fraud, bank fraud, tax evasion, money laundering, federal weapons charges, cybercrime, immigration violations, and public corruption, among others.
In some cases, yes. If an attorney can demonstrate that evidence was obtained unlawfully, that the government lacks probable cause, or that constitutional rights were violated during the investigation, charges can be challenged or reduced. Early intervention is often the key.
Federal sentencing is governed by the U.S. Sentencing Guidelines, a complex scoring system that calculates a recommended sentencing range based on the offense level and the defendant’s criminal history. A knowledgeable defense attorney can argue for downward departures or variances that may significantly reduce the sentence.
If you cannot afford a private attorney, the court will appoint a Federal Public Defender to represent you. However, private attorneys are generally able to dedicate more time and resources to your individual case. We encourage you to contact KN Law Firm, APLC for a free confidential consultation to discuss your options: (888) 950-0011.
Yes. We represent clients at the U.S. District Court for the Central District of California, which covers the greater Los Angeles area including Glendale, Burbank, Pasadena, and surrounding communities. We provide free confidential consultations and are available to discuss your situation at any time.
Related Articles
- What Is a Federal Crime? Key Differences Between State and Federal Charges
- How Federal Criminal Investigations Work in California
- Happens After You Are Charged with a Federal Crime in California?
About the Reviewing Attorney: Chris Nalchajian is the founding criminal defense attorney at KN Law Firm, APLC in Glendale, California. He holds a J.D. with a concentration in Criminal Law from Whittier Law School (2018) and is an active member of the California Attorneys for Criminal Justice and the California Attorneys Association of Los Angeles. Known for his meticulous, detail-oriented approach to every federal criminal defense case, Chris has represented clients across Southern California in a wide range of state and federal matters. Contact KN Law Firm, APLC for a free confidential consultation: (888) 950-0011.
Legal Disclaimer: The information provided in this article is for general educational purposes only and does not constitute legal advice. Reading this content does not create an attorney-client relationship between you and KN Law Firm, APLC. Every federal criminal case is unique, and the law is subject to change. If you are facing a federal investigation, federal indictment, or any federal criminal charge, you should consult with a qualified federal criminal defense attorney immediately. Do not rely on this article as a substitute for professional legal counsel.
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