Expertise
Forensic Accountant Expert Witness Services
A forensic accountant expert witness reconstructs what actually happened to money — where it came from, where it went, and who benefited — and presents that reconstruction in a form a court can test. Themis Expert Witness places vetted forensic accounting experts on civil and criminal matters throughout California, Washington, and Oregon, with Dr. Alvaro Alban, MD, MBA screening every engagement and managing the expert through report and testimony.
What does a forensic accountant expert witness do?
A forensic accountant traces funds through bank, accounting, and tax records to determine whether money was misappropriated, concealed, or mischaracterized. The expert reconstructs incomplete or manipulated books, quantifies the resulting loss, and explains the analysis in a written report, at deposition, and at trial in terms a jury can follow.
The engagement usually starts with a records problem rather than an accounting problem. Statements are missing for the months that matter, the general ledger was rebuilt after the fact, or the entity kept two sets of numbers that never reconciled. The first product of a competent forensic review is an inventory of what exists, what is absent, and what the absence itself suggests. That inventory often reshapes the discovery plan before anyone runs a single calculation.
From there the work is tracing. Deposits are matched to their sources, disbursements to their beneficiaries, and transfers followed across accounts and entities until the trail either terminates in a legitimate business purpose or does not. Where funds have been commingled, the expert applies an accepted tracing method — direct tracing, the lowest intermediate balance rule, or a proportional approach — and states which method was used and why, because the choice of method frequently changes the number.
The last step is quantification and presentation. A tracing exhibit that no one but an accountant can read is a wasted exhibit. The experts our network places build schedules that tie every figure back to a Bates-numbered source document, so opposing counsel can check the arithmetic and the jury can see that it checks out. Opinions are stated with their assumptions on the face of the report rather than buried in a workpaper appendix.
Case types we support
Civil forensic accounting engagements generally turn on one of three questions: was money taken, where did it go, and what is the resulting loss worth. Typical matters include:
Civil litigation
- Fraud investigation and embezzlement analysis in closely held businesses and nonprofits
- Asset tracing and recovery, including transfers through related entities and offshore accounts
- Financial statement reconstruction where books are incomplete, altered, or never properly kept
- Ponzi scheme and investment fraud analysis, including net-winner and net-loser determinations
- Partnership, shareholder, and LLC member disputes involving distributions, draws, and diverted opportunities
- Marital dissolution tracing of separate and community property, including Family Code section 2640 reimbursement claims
- Economic damages quantification in breach of contract, business interruption, and lost profits claims
- Bankruptcy matters, preference analysis, and fraudulent transfer claims under the Uniform Voidable Transactions Act
- Construction and government contract cost accounting disputes
- Insurance claim analysis where proof of loss depends on reconstructed financial records
Criminal matters
- Embezzlement and theft prosecutions requiring independent verification of the alleged loss amount
- Tax evasion cases, including net worth and bank deposits method reconstructions
- Money laundering charges where the source and structuring of funds are contested
- Healthcare billing fraud, where coding, medical necessity, and documentation must be analyzed together
- PPP, EIDL, and other government program fraud allegations involving eligibility and use of proceeds
- Asset forfeiture proceedings requiring tracing of tainted and untainted funds
- Restitution hearings where the government's loss calculation drives the sentencing exposure
In criminal matters the government has usually built its theory from a summary chart, and the defense rarely has an independent read of the underlying records. Engagements include:
How forensic accounting testimony changes case outcomes
Loss figures are far softer than they look. A number that arrives as a single line in a complaint or an indictment is the output of a series of choices — which period was examined, which transactions were treated as improper, whether offsets and legitimate distributions were credited, and what happened to the dollars that were repaid. An independent reconstruction that surfaces those choices frequently moves the figure substantially, and in criminal matters loss amount is often the single largest driver of guideline exposure.
Commingling is where the analysis earns its keep. Once separate and marital funds, or client and operating funds, or investor and personal funds pass through the same account, the answer depends entirely on the tracing convention applied. California is a community property state, and tracing separate property contributions through a jointly titled asset is a recurring engagement in dissolution matters; Washington is likewise a community property state, while Oregon distributes marital property equitably. The same account records can yield materially different conclusions in Sacramento, Tacoma, and Portland, and an expert who does not know which framework governs will produce an exhibit built for the wrong forum.
Testimony also does work that never reaches a jury. A forensic report that reconciles to source documents, credits the other side's legitimate transactions, and states plainly where the records will not support a conclusion is difficult to attack and correspondingly persuasive in mediation. Conversely, a screening review that tells retaining counsel the tracing will not hold is worth more than a report that survives a motion in limine and then unravels on cross.
Why West Coast attorneys retain through Themis
Forensic accounting opinions live or die on methodology, and California trial courts examine methodology directly. Sargon Enterprises v. University of Southern California directs the court to exclude opinion that is speculative or that rests on reasoning the expert cannot connect to the underlying data, and Evidence Code sections 801 and 802 let the court look at the matter the opinion is based on rather than stopping at the expert's qualifications under section 720. A damages model with an unexplained growth assumption or a tracing schedule that skips a link is exposed in California no matter how credentialed the signatory.
The tests differ across the region. Washington applies Frye general acceptance to novel scientific evidence alongside ER 702; Oregon evaluates scientific evidence under the framework from State v. Brown and State v. O'Key together with OEC 702; and federal matters throughout the Ninth Circuit apply Rule 702 as amended in December 2023, which made explicit that the proponent must establish admissibility by a preponderance and that the reliability of the expert's application of a method is an admissibility question rather than a matter of weight. Reports are drafted with the governing standard in view from the first draft.
Themis operates as a managed expert network. Dr. Alban does not testify as a forensic accountant; he sources and vets the CPA, CFE, or CFF credentialed expert placed on the matter, and his own medical training combined with formal training in finance shapes how engagements are screened. In healthcare billing fraud matters that combination is directly useful — someone has to read the clinical documentation to say whether the services billed were actually rendered and medically indicated, and Dr. Alban provides that parallel read alongside the accounting analysis. He stays involved through report review and trial preparation, and testimony is available in state and federal courts across California, Washington, and Oregon, in person or remotely.
Practice notes for each jurisdiction are set out on the California, Washington, and Oregon pages, and the engagement process explains what happens after you make contact.
Frequently Asked Questions
Forensic accounting engagements are billed hourly, and the range nationally runs from roughly two hundred to five hundred dollars an hour depending on the expert's credentials and the complexity of the records, with deposition and trial testimony typically billed at a premium or against a half-day or full-day minimum. The dominant cost driver is volume: tracing three years of transactions across eight accounts costs a multiple of what a single-account review costs. Preliminary screening is complimentary, and a written fee schedule and estimated budget range are provided before the engagement letter is signed.
A focused single-entity tracing review often produces preliminary findings within two to four weeks of receiving complete records. Multi-entity fraud investigations, Ponzi scheme reconstructions, and matters requiring the rebuilding of books from primary documents commonly run two to four months. The schedule is driven almost entirely by records production rather than analysis time, which is why early retention matters — an expert engaged before discovery closes can tell you which accounts to subpoena instead of working with whatever arrives.
At minimum: bank and brokerage statements with cancelled checks and deposit detail for the full relevant period, the general ledger and trial balances, tax returns for the entity and any relevant individuals, loan and financing documents, and the pleadings. Accounting system backups in native format are far more useful than printed reports, because native data preserves the audit trail and shows post-dated entries. Missing records are not a barrier to a screening call; identifying the gaps is usually the most valuable early deliverable.
California presumes property acquired during marriage is community property, so a spouse claiming a separate property interest carries the burden of tracing it. Where separate funds have been deposited into a community account, the expert must apply a recognized tracing method to establish that separate funds were available and were the source of the acquisition, and Family Code section 2640 reimbursement claims require documenting the separate contribution to the purchase. Washington applies a comparable community property framework; Oregon, by contrast, distributes marital property equitably, which changes the analysis substantially.
Yes, and it is often the highest-value work in a white collar defense. Government loss figures are frequently built on gross transaction totals without crediting repayments, legitimate services rendered, or amounts attributable to conduct outside the charged period. An independent reconstruction that identifies those offsets can materially reduce the loss amount that drives guideline calculations and restitution. The same analysis applies in asset forfeiture, where tracing untainted funds out of a commingled account can preserve property the government has moved to seize.
Both, and on both sides of criminal matters. The forensic accountants in our network are retained by plaintiffs pursuing fraud and diversion claims and by defendants challenging inflated damages models, by prosecutors and by defense counsel. That balance matters at trial: an expert whose entire engagement history sits on one side of the docket invites a bias cross-examination that has nothing to do with whether the tracing is correct. Engagement history is disclosed at the outset so counsel knows what will surface in deposition.
Related expertise
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Complimentary preliminary screening
Retain a forensic accountant expert witness
Preliminary screening is complimentary. Send the posture of your matter — jurisdiction, claims, and the schedule you are working under — and Dr. Alvaro Alban, MD, MBA will identify the expert discipline the issue points to, check availability and conflicts, and tell you candidly whether the materials look suitable for expert review before you retain anyone.
- Service area
- California, Washington, and Oregon — state and federal courts, in person and by remote deposition.
- Phone
- (347) 860-4763