San Diego Criminal Tax Defense Attorney

What Is a Criminal Tax Investigation?

A criminal tax investigation is a federal law enforcement inquiry conducted by IRS Criminal Investigation (CI) — the only IRS division authorized to carry firearms, execute search warrants, and make arrests. CI employs approximately 2,100 special agents across 20 field offices, and each agent carries a federal badge and a mandate to investigate potential violations of Title 26 (Internal Revenue Code) and related financial statutes.

The government's objective is proving willfulness — that you intentionally violated a known legal duty. Under 26 U.S.C. §7201, the prosecution must establish three elements: a tax deficiency existed, an affirmative act of evasion occurred, and the taxpayer acted willfully. This standard is higher than civil negligence, but CI's 90%+ conviction rate demonstrates that cases referred for prosecution have already been built to meet it.

The critical distinction is timing. A civil audit conducted by a revenue agent becomes a criminal investigation the moment CI accepts a referral — and the taxpayer is often the last person to know. Everything said during the civil phase can be used in the criminal case, which is why the transition point between civil and criminal exposure is the single most dangerous moment in any tax dispute.

6 Federal Criminal Tax Offenses — and Why the Charge Matters

The specific statute the government charges determines the maximum sentence, the elements the prosecution must prove, and the defense strategies available. Each offense requires different proof, and the distinction between a felony carrying five years and a misdemeanor carrying one year often comes down to a single element: willfulness.

Tax Evasion — 26 U.S.C. §7201

The most serious tax crime and the most commonly charged. Requires proof of a tax deficiency, an affirmative act of evasion (hiding income, inflating deductions, maintaining two sets of books), and willfulness. Felony carrying up to 5 years in prison and a $250,000 fine.

Filing a False Return — 26 U.S.C. §7206(1)

Covers any material false statement on a tax return signed under penalty of perjury. Does not require a tax deficiency — the false statement itself is the crime. Felony carrying up to 3 years and a $250,000 fine.

Willful Failure to File — 26 U.S.C. §7203

A misdemeanor that becomes a felony's companion charge. Requires proof the taxpayer was required to file, failed to do so, and acted willfully. Carries up to 1 year per count and a $25,000 fine — but prosecutors often stack multiple years as separate counts.

Willful Failure to Collect or Pay Over Tax — 26 U.S.C. §7202

Targets business owners who withhold employment taxes from employee paychecks but fail to remit them to the IRS. The trust fund recovery penalty under IRC §6672 creates civil liability; §7202 adds criminal exposure. Felony carrying up to 5 years and a $250,000 fine.

Aiding or Assisting a False Return — 26 U.S.C. §7206(2)

Applies to tax preparers, accountants, and advisors who knowingly prepare or assist in preparing a fraudulent return. Carries the same 3-year maximum as §7206(1) and is frequently used against promoter schemes and return preparation mills.

Obstruction of Tax Administration — 26 U.S.C. §7212

Covers attempts to intimidate or impede IRS officers, destroy records after an investigation begins, or interfere with tax administration. Frequently added as a supplemental charge when evidence destruction or witness tampering is discovered. Felony carrying up to 3 years.

Offense	IRC Section	Classification	Max Prison	Max Fine	Key Element
Tax Evasion	§7201	Felony	5 years	$250,000	Affirmative act + willfulness
False Return	§7206(1)	Felony	3 years	$250,000	Material false statement
Failure to File	§7203	Misdemeanor	1 year / count	$25,000	Willful non-filing
Failure to Pay Over	§7202	Felony	5 years	$250,000	Trust fund diversion
Aiding False Return	§7206(2)	Felony	3 years	$250,000	Knowing assistance
Obstruction	§7212	Felony	3 years	$250,000	Interference / intimidation

What Happens From the Moment IRS Criminal Investigation Contacts You

1. Invoke Your Right to Counsel Immediately

   The moment an IRS special agent identifies themselves — whether at your door, your business, or by phone — you say one sentence: "I am invoking my right to counsel and will not answer questions without my attorney present." Special agents are trained to conduct surprise interviews specifically because unrepresented taxpayers make admissions in the first 60 seconds. Every word you say is memorialized in the agent's report and can be used at trial.

2. Retain a Criminal Tax Attorney — Not a General Criminal Lawyer

   Criminal tax defense requires dual expertise in federal criminal procedure and the Internal Revenue Code. We file our notice of representation with CI immediately, halting direct contact between the agent and you. A general criminal defense attorney understands sentencing guidelines but may not recognize that a Kovel arrangement is needed to protect communications with your accountant, or that the net worth method of proof has specific procedural vulnerabilities.

3. Identify Whether You Are in the Primary or Subject Investigation Phase

   CI conducts investigations in two phases. The primary investigation is a preliminary screening — the agent is determining whether a full case is warranted. The subject criminal investigation means CI has identified you as a target and is actively building the case for prosecution referral. We determine which phase you are in by analyzing the contact method, the documents requested, and whether third-party summonses have already been issued.

4. Preserve All Financial Records and Electronic Data

   Destroying, altering, or concealing documents after a criminal investigation begins creates a separate obstruction charge under §7212 and consciousness-of-guilt evidence that devastates any defense. We issue a formal litigation hold to you, your accountant, your bookkeeper, and any cloud service providers. Every bank statement, QuickBooks file, email, and text message from the relevant tax years must be preserved.

5. Conduct an Independent Forensic Tax Analysis

   We retain a forensic accountant under Kovel protection — meaning their work product is shielded by attorney-client privilege because they are engaged by our firm, not by you directly. The forensic analysis reconstructs your actual tax liability, identifies the government's likely proof method (specific items, net worth, bank deposits, or cash expenditures), and quantifies the true tax loss — the single most important factor in federal sentencing under U.S.S.G. §2T1.1.

6. Engage With CI or the DOJ Tax Division on Defense Terms

   If the case has not yet been referred to the Department of Justice, we present our findings to the assigned special agent and the CI group manager through a formal conference. Our goal at this stage is a declination — CI closing the case without prosecution referral. If the case has already been referred, we engage with the DOJ Tax Division attorney through a reverse proffer, presenting our factual and legal defenses before any indictment decision.

7. Resolve Pre-Indictment or Prepare for Trial Defense

   Pre-indictment resolution remains the most favorable outcome: CI declines prosecution, the case returns to civil status, and you face penalties but no criminal record. If indictment proceeds, we file pretrial motions to suppress evidence obtained through defective search warrants, challenge the government's proof of willfulness, and prepare expert testimony on the tax loss calculation. Approximately 66% of convicted defendants in federal tax cases receive prison sentences, with an average sentence of 15 months.

What IRS Special Agents Are Actually Looking For

Special agents are not auditors. Revenue agents determine the correct tax; special agents build criminal prosecutions. Their objective from the first contact is collecting evidence that proves willfulness — the intentional violation of a known legal duty. Every question they ask, every document they request, and every third-party interview they conduct is designed to establish that you knew what the law required and chose to violate it.

Badges of Fraud: The IRS Targeting Framework

IRM 25.1.2 codifies the specific indicators — called badges of fraud — that CI uses to evaluate whether criminal intent is present. These are not general suspicions; they are documented factors that appear in every Special Agent Report. The primary badges include: maintaining two sets of books or records, making false entries or alterations in books and records, destroying books or records (especially after an audit begins), concealing assets or income sources, engaging in cash transactions designed to avoid reporting thresholds, filing false documents including false Forms W-4, and a consistent pattern of underreporting substantial amounts of income over multiple years. A single badge rarely triggers a criminal referral. CI looks for three or more badges appearing together, combined with a tax loss that justifies the prosecution resources.

How Special Agents Expand the Scope of an Investigation

The initial investigation scope is defined by the referral — typically specific tax years and specific issues. Agents expand scope through three mechanisms that the taxpayer often triggers unwittingly. First, voluntary statements during an interview that reference unreported income in years outside the original scope create probable cause to examine those years. Second, documents produced in response to a summons that reveal undisclosed bank accounts, business entities, or foreign financial accounts expand the investigation to those assets. Third, inconsistencies between the taxpayer's statements and third-party records — particularly when the taxpayer has already spoken to the agent without counsel — provide the basis for additional charges including false statements. The most common scope expansion we see is a single-year evasion investigation that becomes a multi-year, multi-count prosecution because the taxpayer spoke to the agent before retaining counsel.

What Produces a Favorable Outcome Before Indictment

A pre-indictment declination requires demonstrating to CI that the prosecution cannot prove willfulness beyond a reasonable doubt. We accomplish this by presenting evidence of good-faith reliance on a tax professional (documented in contemporaneous written advice), establishing that alleged unreported income was actually non-taxable (loan proceeds, gifts, recharacterized transactions), or proving that the government's proof method — whether net worth, bank deposits, or specific items — contains computational errors that reduce the tax loss below the threshold where prosecution is justified. The median tax loss in cases CI pursues is approximately $491,000. Below that threshold, the cost-benefit analysis shifts toward civil resolution, and our forensic rebuttal gives CI the factual basis to close the case.

Your Rights During a Criminal Tax Investigation

The Fifth Amendment to the United States Constitution provides the foundation: no person shall be compelled to be a witness against themselves. In a criminal tax investigation, this right is absolute — and invoking it cannot be used as evidence of guilt.

• Right to Remain Silent Under the Fifth Amendment You have no obligation to answer any question from an IRS special agent, and your silence cannot be introduced as evidence at trial. Invoke this right explicitly: "I am exercising my Fifth Amendment right and will not answer questions without my attorney present."
• Right to Counsel Under the Sixth Amendment Once criminal proceedings attach, you have the right to an attorney at every critical stage. Before indictment, this right is protected by the Fifth Amendment's due process clause. Request counsel before any interview, document production, or voluntary appearance before a grand jury.
• Right to Refuse Consent to a Search Under the Fourth Amendment Without a warrant signed by a federal magistrate, you have no obligation to allow IRS special agents into your home, business, vehicle, or any private space. State clearly: "I do not consent to a search." If agents have a warrant, do not physically resist — but document every item seized and contact your attorney immediately.
• Right to a Grand Jury Determination Under the Fifth Amendment Federal felony charges — including tax evasion under §7201 — require a grand jury indictment. The government cannot bypass this requirement. You have the right to testify before the grand jury (though exercising this right is a strategic decision your attorney should evaluate).
• Right to Review All Discovery Under Federal Rule of Criminal Procedure 16 After indictment, the government must disclose all evidence it intends to use at trial, including the Special Agent Report, forensic analyses, witness statements, and any exculpatory evidence under Brady v. Maryland (1963). We review every page of discovery to identify suppression issues, Jencks Act materials, and evidence that undermines the government's proof of willfulness.

If You Are Charged: Defense Strategies and Resolution

Pre-Indictment Resolution — The Strongest Position

The 6-year statute of limitations for most criminal tax offenses under 26 U.S.C. §6531 means the government must indict within six years of the alleged offense. During the investigation phase — before any indictment — we pursue a declination by presenting exculpatory evidence directly to CI and the DOJ Tax Division. A reverse proffer allows us to present our defense theory, forensic analysis, and legal arguments before the government commits to prosecution. Approximately 0.3% of IRS cases result in criminal prosecution, meaning the vast majority of investigations are closed administratively or declined by DOJ.

Voluntary Disclosure — Eliminating Criminal Exposure

The IRS Voluntary Disclosure Practice (VDP), administered through IRS Form 14457, allows taxpayers who have not yet been contacted by CI to come forward, disclose unreported income or unfiled returns, and pay all taxes, interest, and penalties in exchange for a commitment that the IRS will not recommend criminal prosecution. The VDP requires full cooperation, complete disclosure, and payment of a 75% civil fraud penalty (or the proposed 20% accuracy-related penalty under the 2026 reform) — a significant cost, but one that eliminates prison exposure entirely.

Our Track Record at This Stage

We build the defense during the investigation, not after indictment. Our forensic accountant begins reconstructing the taxpayer's actual liability the week we are retained — because the numbers drive every outcome in a criminal tax case. The tax loss calculation under U.S.S.G. §2T1.1 determines the base offense level, and reducing the tax loss from $500,000 to $150,000 can mean the difference between a Guidelines range of 18–24 months and 0–6 months. With 100+ appeal victories and a criminal investigation dismissed with no charges filed, we have demonstrated that early, aggressive, forensically-driven defense changes outcomes.

Why Brotman Law for Criminal Tax Defense

• Criminal investigation dismissed, no charges filed — we have secured pre-indictment declinations by presenting forensic rebuttals directly to IRS CI group managers before cases reach the DOJ Tax Division.
• Dual tax and criminal defense capability from day one — Sam Brotman holds a J.D., LL.M. in Taxation, and MBA, combining the tax code expertise and federal criminal procedure knowledge that criminal tax cases demand.
• Kovel-protected forensic analysis built immediately — we retain forensic accountants under attorney-client privilege the week you engage us, ensuring the numbers are reconstructed before the government finalizes its calculations.
• 400+ audit clients represented and 100+ appeal victories — our civil tax defense experience means we recognize the warning signs of criminal referral during a civil audit and intervene before the investigation escalates.
• Direct attorney communication from first contact — you never speak to an IRS special agent, respond to a summons, or produce a document without our review. We control every point of contact between you and the government.

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