Written by Zachary Newland, Founding Partner. Last updated August 4, 2026.

Colorado Federal Criminal Defense Lawyer

On This Page

• Federal Criminal Defense in the District of Colorado
• Common Federal Charges in Colorado
• What to Do When Federal Agents Contact You
• Why Evergreen Attorneys Defends Federal Cases in Colorado
• How Evergreen Attorneys Helps at Every Federal Stage
• Frequently Asked Questions

Federal criminal investigations and prosecutions in Colorado carry consequences that have nothing in common with the state court system. The U.S. Attorney’s Office for the District of Colorado pursues cases involving drug trafficking organizations operating along the Interstate 25 corridor, complex financial fraud tied to Colorado’s technology and energy sectors, firearms offenses, healthcare fraud, and public corruption.

Conviction in the Alfred A. Arraj United States Courthouse in Denver, or before any federal court in the district, means exposure to the Federal Sentencing Guidelines, mandatory minimum sentences, federal supervised release, and a conviction record that cannot be expunged. If you or your business is under federal scrutiny in Colorado, the decisions you make now will define what happens next.

If federal agents (FBI, DOJ, DEA, OIG or any others) have contacted you or you have received a grand jury subpoena, a target letter, or a civil investigative demand, contact Evergreen Attorneys at (303) 948-1489 to immediately receive a confidential case evaluation.

Federal Criminal Defense in the District of Colorado

The United States District Court for the District of Colorado sits in Denver and has jurisdiction over all federal criminal matters arising anywhere in the state of Colorado. Cases are investigated by agencies including the FBI’s Denver Field Office, the DEA’s Rocky Mountain Division, IRS Criminal Investigation, the Bureau of Alcohol, Tobacco, Firearms and Explosives, the U.S. Postal Inspection Service, and the Department of Health and Human Services Office of Inspector General. Each of these agencies operates independently of Colorado state law enforcement, and each reports to federal prosecutors who are members of the federal Department of Justice.

Federal cases in Colorado follow the Federal Rules of Criminal Procedure. Initial appearances and arraignments occur before a U.S. Magistrate Judge. Pretrial detention hearings under 18 U.S.C. § 3142 can result in defendants being held without bond, particularly in drug trafficking and firearms cases where the government invokes statutory presumptions of detention. You can read more about bond, initial appearances, arraignments, and detention hearings on our blog where we have previously covered these topics in detail.

Trial-stage proceedings move to an Article III district judge, and sentencing is governed by the advisory Federal Sentencing Guidelines, which use offense levels and criminal history categories to calculate a recommended imprisonment range.

Understanding these procedures is not optional. A Colorado federal criminal defense lawyer must know how the District of Colorado handles plea negotiations, discovery obligations under Brady and Jencks, and exepert Daubert motions, and the specific sentencing practices of the judges who sit in the Arraj Courthouse.

Colorado federal criminal defense is a very different skill set than practicing in Colorado state courts. You need a lawyer who spends his time focusing exclusively on federal criminal defense to get the best results.

Common Federal Charges in Colorado

Federal prosecutors in Colorado concentrate resources on several categories of criminal conduct. The specific charges a defendant faces determine the applicable mandatory minimums, guideline ranges, and collateral consequences.

Drug Trafficking and Distribution

Colorado’s position as a distribution hub makes federal drug crimes a persistent enforcement priority. Cases often involve methamphetamine, fentanyl, cocaine, and large-scale marijuana distribution that violates federal law regardless of Colorado’s state legalization framework.

Charges under 21 U.S.C. §§ 841 and 846 carry mandatory minimum sentences of five, ten, or up to twenty years depending on drug type/quantity and if any serious bodily injury results from the drugs.

White Collar Crime and Financial Fraud

Colorado’s growing technology, energy, and financial sectors generate a substantial volume of federal fraud investigations. Wire fraud (18 U.S.C. § 1343), securities fraud, bank fraud, and tax fraud are among the most commonly charged offenses. These cases frequently begin with grand jury subpoenas or civil investigative demands months or years before an indictment is returned.

Healthcare Fraud

The DOJ and HHS-OIG actively investigate healthcare fraud in Colorado, targeting providers, billing companies, and executives suspected of submitting false claims to Medicare and Medicaid. Charges under 18 U.S.C. § 1347 carry up to ten years in federal prison per count, with enhancements for schemes exceeding certain dollar thresholds.

We have an entire hub of content related to healthcare fraud defense that you can access here: https://evergreenattorneys.com/health-care-fraud/

Firearms Offenses

Federal firearms charges under 18 U.S.C. § 922(g) and related statutes are prosecuted aggressively in Colorado. These cases often arise from joint federal-state task force operations and carry significant mandatory minimum sentences, particularly when combined with drug trafficking allegations.

What to Do When Federal Agents Contact You

A federal investigation typically becomes visible to the target long before charges are filed. Knowing what to do at each stage can prevent catastrophic mistakes.

If you receive a target letter. A federal target letter means a federal prosecutor has identified you as a likely defendant. Do not contact the issuing office, do not attempt to explain your conduct, and do not destroy or alter any documents. Retain a federal criminal defense attorney before taking any action.

If agents appear at your door or workplace. You are not required to speak with federal agents. You may decline to answer questions and ask to speak with an attorney. Anything you say, including seemingly innocent clarifications, can be used against you. Making a false statement to a federal agent is itself a felony under 18 U.S.C. § 1001, even if the underlying investigation never results in charges.

If you receive a grand jury subpoena. A subpoena to testify before a federal grand jury or to produce documents is a compulsory legal process. You must comply with the subpoena’s terms, but you should consult a federal defense attorney before producing any documents or appearing. An attorney can negotiate the scope of document production, assert applicable privileges, and advise you on Fifth Amendment protections.

If your business receives a civil investigative demand. A CID from the DOJ often precedes a criminal referral. Treat it as a signal that the government is building a case, not merely conducting a routine inquiry.

Colorado’s Supreme Court-proven Federal Criminal Defense Team.

Why Evergreen Attorneys Defends Federal Cases in Colorado

Evergreen Attorneys is a federal criminal defense boutique headquartered in Evergreen, Colorado. The firm handles only federal criminal investigations and cases. This is not a general practice that occasionally takes a federal case; federal defense is our entire focus.

Zachary Newland, the firm’s Founding Partner, graduated from Georgetown University Law Center and has appeared as counsel of record in more than 120 federal cases since 2016. He has never been a prosecutor. His career has been built exclusively on defending people accused of federal crimes, including drug trafficking, wire fraud, healthcare fraud, firearms offenses, and cases arising from federal grand jury investigations.

In June 2026, Evergreen Attorneys won a unanimous 9-0 decision in the U.S. Supreme Court in United States v. Hemani.

Every client at Evergreen Attorneys receives partner-level representation. The firm does not delegate substantive case work to junior associates or contract attorneys. When a Colorado federal criminal case requires trial preparation, plea negotiation, sentencing advocacy, or post-conviction relief, the attorney who appears in court is the attorney who built the defense.

How Evergreen Attorneys Helps at Every Federal Stage

Federal cases move through distinct stages, and effective defense requires different skills at each one.

During the investigation stage, Evergreen Attorneys works to identify the scope of the government’s inquiry, advise on document preservation and production obligations, prepare clients for potential grand jury proceedings, and engage with prosecutors to present favorable information before charging decisions are made.

At the charging and pretrial stage, the firm analyzes the indictment or information for legal deficiencies, files appropriate motions to suppress evidence or dismiss counts, and prepares detailed bail arguments to secure pretrial release.

During plea negotiations, Evergreen Attorneys evaluates cooperation agreements, safety-valve eligibility under 18 U.S.C. § 3553(f), and the realistic sentencing exposure under the Guidelines to ensure clients make fully informed decisions.

At trial, the firm handles jury selection, cross-examination, expert challenges, and closing argument with the depth that only a practice devoted entirely to federal criminal defense can provide.

At sentencing, Evergreen Attorneys prepares comprehensive sentencing memoranda, identifies applicable departures and variances, and presents mitigation evidence to the court. For clients who need post-conviction relief, the firm handles federal appeals and post-conviction motions including 28 U.S.C. § 2255 petitions.

Frequently Asked Questions

What is the difference between Colorado state criminal charges and federal criminal charges?

State charges are prosecuted by a district attorney in Colorado state court under the Colorado Revised Statutes. Federal charges are prosecuted by an Assistant United States Attorney in the U.S. District Court for the District of Colorado under federal statutes.

Federal cases carry different (and often more severe) sentencing structures, including mandatory minimums and the Federal Sentencing Guidelines. The procedural rules, discovery obligations, and appeal paths are entirely separate systems.

Can I be charged in both Colorado state court and federal court for the same conduct?

Yes. The dual sovereignty doctrine permits both the state of Colorado and the federal government to prosecute the same conduct without violating the Double Jeopardy Clause. This situation arises most often in drug cases and firearms cases where joint task forces refer evidence to both jurisdictions.

What are the federal sentencing guidelines and how do they affect my case?

The Federal Sentencing Guidelines are an advisory framework that federal judges use to calculate a recommended sentencing range based on the offense level (which accounts for conduct severity, enhancements, and adjustments) and the defendant’s criminal history category. While the Guidelines are advisory after United States v. Booker (2005), judges must calculate and consider them. Calculating the applicable Guideline range is still the starting point for all sentencing.

Effective advocacy at sentencing requires detailed knowledge of how to reduce the offense level through acceptance-of-responsibility adjustments, minor-role arguments, and relevant departures.

How long do federal investigations last before charges are filed in Colorado?

Federal investigations can last months or years before an indictment is returned. Complex white collar cases and healthcare fraud investigations routinely span two to five years. During this period, the government issues subpoenas, interviews witnesses, reviews financial records, and presents evidence to a grand jury. Early involvement of a federal defense attorney during the investigation stage can sometimes prevent charges from being filed at all.

When should someone under federal investigation in Colorado retain a defense attorney?

Immediately. The moment you become aware of federal interest in your conduct, whether through a target letter, a grand jury subpoena, an agent visit, or contact from a co-worker or associate who has been questioned, you should retain a federal criminal defense attorney. Statements made before you have counsel, documents produced without legal review, and decisions made without understanding the federal process can permanently damage your ability to defend yourself.

If you are facing a federal criminal investigation, federal charges, or a federal sentencing proceeding in Colorado, contact Evergreen Attorneys at (303) 948-1489 for an immediate case evaluation with a federal criminal defense lawyer today.