Can the IRS Get Involved in My Criminal Case in San Diego?

Most people think of the IRS as a collection agency. You owe money, you set up a payment plan, you move on. That’s the civil side, and for the overwhelming majority of tax problems, that’s where it stays. But there’s a second IRS most people never see coming: a division of armed federal agents who build criminal cases. When they get involved, the question is no longer how much you owe. It’s whether you’re going to be indicted.

David P. Shapiro Criminal Defense Attorneys helps San Diego business owners and professionals who suddenly find their tax problem turning into something far more serious. This guide breaks down when a tax matter becomes criminal, what the IRS actually pursues, and what to do the moment a special agent shows up.

When does an IRS tax problem become a criminal case?

A tax problem becomes criminal when the IRS believes you acted willfully, not carelessly. Owing money, filing late, or making an honest error is a civil matter. Deliberately hiding income, falsifying records, or lying to an agent is what pushes a case from the civil side to IRS Criminal Investigation. The line is intent.

Here’s what most people misunderstand. The IRS doesn’t warn you when it crosses that line. There’s no letter that says “your audit is now criminal.” The shift happens quietly, often inside a routine audit.

In our experience, the warning signs are subtle. A Revenue Agent who was responsive suddenly goes quiet. Your audit stalls without explanation. You get a request to preserve records that feels oddly specific. Any of these can mean the civil case has been referred to Criminal Investigation, and agents are now building a case while you assume you’re still negotiating a bill.

That distinction, careless versus willful, is everything. And it’s exactly where good people get into trouble, because they keep talking as if they’re still in a civil audit.

What is IRS Criminal Investigation, and how is it different from an audit?

IRS Criminal Investigation (IRS-CI) is the law enforcement arm of the IRS. Its special agents carry badges, carry firearms, and build federal criminal cases. This is entirely different from an audit, which is handled by a Revenue Agent who is a civil examiner with no arrest power. One wants your money. The other wants a conviction.

The two roles are easy to confuse until you know what to look for.

The Revenue Agent (civil)

A Revenue Agent conducts audits. Their job is to determine what you owe and collect it. They can assess penalties and interest, but they cannot arrest you or refer you for prosecution on their own. Most people who deal with the IRS never encounter anyone else.

The Special Agent (criminal)

A Special Agent works for IRS-CI. They investigate tax fraud, money laundering, and financial crimes for referral to the Department of Justice. When a Special Agent contacts you, the investigation is typically well underway. They rarely show up to ask questions they don’t already have answers to.

The IRS-CI Los Angeles Field Office covers San Diego territory, and its agents operate locally. When one appears at your door, the case has moved past collection. It’s now about whether you go to federal court.

What crimes does the IRS actually pursue?

IRS Criminal Investigation pursues far more than unpaid taxes. Its core cases involve tax evasion, filing false returns, structuring cash to avoid reporting, and money laundering. But the charges rarely stand alone. Federal prosecutors routinely stack fraud and conspiracy counts on top, which is how a tax case becomes a multi-count federal indictment.

The tax-specific charges (evasion, false returns, structuring) live in the federal tax and banking codes. Alongside them, prosecutors reach for a familiar set of federal fraud statutes:

• Mail fraud applies when fraudulent financial or tax documents move through the mail.¹
• Wire fraud covers electronic filings, wire transfers, and internet transactions, and it’s one of the most frequently charged federal fraud offenses.²
• Bank fraud comes into play with structuring or false account and loan activity.³
• Conspiracy statutes let prosecutors charge everyone involved in a scheme, even without completing the underlying fraud.⁴ ⁵

In San Diego, the border-adjacent cash economy matters here. Cash-intensive businesses in the South Bay and Chula Vista corridor draw more structuring and money-laundering scrutiny than you’d see in an inland market. That local reality shapes how these cases get charged.

What should I do if an IRS special agent contacts me in San Diego?

Say nothing beyond your name, then call a lawyer. When a Special Agent contacts you, you have the right to remain silent and the right to counsel. Use both. Politely decline to answer questions, ask for a business card, and tell them your attorney will be in touch. Do not try to explain, clarify, or talk your way out of it.

In our experience, the single biggest mistake people make is trying to explain themselves to a Special Agent without counsel present. It feels natural. You’re a good person, this is a misunderstanding, and you want to clear it up. That instinct is exactly the trap.

Here’s why. Lying to a federal agent, even about something small, is itself a federal felony punishable by up to five years in prison.⁶ You don’t have to be under oath.⁶ A Special Agent already has the documents. When your off-the-cuff answer conflicts with what they’ve got, that inconsistency doesn’t clear anything up. It can become a fresh criminal charge, stacked on top of whatever brought them to your door.

A knock-and-talk in San Diego often happens early in the morning, at your home or business, when you’re caught off guard. That timing is deliberate. The smart move is not the middle-ground move. It’s the disciplined one: keep your mouth closed and let your lawyer do the talking for you.

Can I face state charges and federal IRS charges at the same time?

Yes. A federal IRS case and a California state case can run at the same time, on the same facts. This is called parallel proceedings, and it’s a real two-front exposure in San Diego. The federal track runs through IRS-CI and the U.S. Attorney’s Office. The state track runs through the California Franchise Tax Board and the San Diego County District Attorney.

The state side has real teeth. California’s money laundering statute makes it a crime to route transactions through financial institutions exceeding certain dollar thresholds, either to promote criminal activity or knowing the money came from it.⁷ It’s a wobbler, chargeable as a felony or misdemeanor, and value-based enhancements can add years of prison time as the amounts climb.⁷

When our team sees both federal and state exposure on the same set of facts, the defense has to be coordinated on both fronts at once. A move that helps on one track can hurt on the other. Trying to fight two governments separately, with two uncoordinated strategies, is how people end up convicted twice for one course of conduct. Understanding how California money laundering charges work is part of building that coordinated defense.

How structuring cash deposits can turn into a federal charge

Structuring is the crime of breaking up cash deposits to stay under the $10,000 federal reporting threshold. And here’s the part that surprises people: it’s illegal even if every dollar is legitimate. The crime isn’t hiding dirty money. It’s deliberately avoiding the report the bank would otherwise file. Intent to evade the reporting requirement is the whole offense.

Picture a Chula Vista business owner who takes in cash all week. He knows deposits over $10,000 trigger a bank report, and he’d rather not deal with the attention. So he deposits $9,500 on Monday and $9,000 on Thursday. Every dollar is from legitimate sales. He’s never underreported a cent of income.

He may have just committed a federal crime.

That’s the trap of structuring. It doesn’t require dirty money or unpaid taxes. It only requires that you split up deposits to dodge the report. Once agents see a deposit pattern that hugs the threshold, they infer intent, and a clean cash business suddenly looks like it’s hiding something. In a border-adjacent, cash-heavy market like San Diego’s, this pattern gets flagged more often than most business owners realize.

Where are IRS criminal cases prosecuted in San Diego?

Federal IRS criminal cases in San Diego are prosecuted in the U.S. District Court for the Southern District of California, at the federal courthouse in downtown San Diego. This is federal court, not the state Superior Court most people are familiar with. Different judges, different prosecutors, different rules, and no state-court plea options.

That difference matters more than it sounds. Federal court moves on its own timeline, with federal sentencing guidelines that constrain how much discretion a judge has. The U.S. Attorney’s Office, not the San Diego DA, decides the federal charges, and the Department of Justice Tax Division often signs off on tax prosecutions before they’re filed.

Our team is familiar with how these cases move through the federal courthouse in downtown San Diego. The reality is that federal white-collar cases are built slowly and deliberately, often over months or years, before anyone is ever charged. By the time you know you’re a target, the government has usually done most of its work. That’s precisely why the early moves, before an indictment, matter so much.

Frequently Asked Questions

Does the IRS tell you before they file criminal charges?

Not always, and often not clearly. Sometimes you’ll receive a target letter from the U.S. Attorney’s Office signaling that charges are near. Other times the first sign is a Special Agent at your door, or an indictment itself. In our experience, the quiet warning signs during an audit often come before any formal notice.

Can I go to federal prison for unpaid taxes, or just for fraud?

Owing back taxes alone is a civil matter, not a crime, and won’t send you to prison on its own. Prison exposure comes from willful conduct: evasion, filing false returns, or lying to agents. The government has to prove you acted deliberately, not that you simply failed to pay.

What is the difference between tax avoidance and tax evasion?

Tax avoidance is legal. It’s using deductions, credits, and lawful strategies to reduce what you owe. Tax evasion is illegal. It’s deliberately hiding income, falsifying records, or concealing assets to escape taxes you actually owe. The dividing line is willful deception, and that’s the line IRS Criminal Investigation looks for.

If I amend my return, can I still be charged criminally?

Possibly. Filing an amended return does not automatically erase criminal exposure for the original filing, and a poorly timed amendment can even signal awareness of wrongdoing. If you’re considering correcting a return you suspect was false, talk to a defense attorney before filing anything, not after.

How long does an IRS criminal investigation take?

Federal tax investigations often take a year or more, sometimes longer. IRS-CI builds cases methodically, gathering records, tracing transactions, and interviewing witnesses before approaching the target. That long timeline is a reason to act early. The sooner you have counsel, the more options exist before charges are filed.

Contact David P. Shapiro Criminal Defense Attorneys About IRS Criminal Investigations in San Diego

A tax problem turns criminal the moment the IRS believes you acted willfully, and once Criminal Investigation is involved, what you say and do next can shape the entire case. Every situation is different, and federal tax exposure often carries parallel state exposure that has to be handled together. If a Special Agent has contacted you or you suspect an audit has shifted, contact David P. Shapiro Criminal Defense Attorneys to discuss a case evaluation.

References

¹ 18 U.S.C. § 1341 [making it a federal offense to use the mails to execute a scheme to defraud or obtain money or property by false pretenses; punishable by up to 20 years’ imprisonment, or up to 30 years if the fraud affects a financial institution].

² 18 U.S.C. § 1343 [prohibiting the use of interstate wire communications to execute a scheme to defraud; punishable by up to 20 years’ imprisonment, or up to 30 years if the fraud affects a financial institution].

³ 18 U.S.C. § 1344 [prohibiting knowingly executing a scheme to defraud a financial institution; punishable by up to 30 years’ imprisonment and a fine up to $1,000,000].

⁴ 18 U.S.C. § 1349 [conspiracy to commit wire, mail, bank, or other fraud, punishable by the same maximum as the underlying offense; completion of the fraud is not required].

⁵ 18 U.S.C. § 371 [conspiracy to commit any offense against the United States or to defraud the United States; punishable by up to 5 years’ imprisonment].

⁶ 18 U.S.C. § 1001 [prohibiting knowingly and willfully making materially false statements to a federal agency or agent; a federal felony punishable by up to 5 years in prison, and applicable even when the person is not under oath].

⁷ Cal. Penal Code § 186.10 [money laundering; conducting transactions through financial institutions exceeding statutory dollar thresholds with intent to promote criminal activity or knowledge the funds are criminal proceeds; a wobbler with consecutive value-based sentence enhancements].