Senior judgment for consequential decisions.
Daniel R. Mercer is a partner in the firm’s terrorism-financing and material-support defense practice. His work spans grand-jury investigations, federal litigation, organizational representations and sensitive witness issues under 18 U.S.C. §§ 2339A and 2339B. He previously served for fifteen years in the Department of Justice Counterterrorism Section, including as a section chief. He brings that institutional understanding to the defense without assuming that every investigative lead is correct or every association establishes prohibited support.
Daniel disaggregates the government’s theory. He identifies the alleged support, its recipient, the relevant designation timeline, the claimed mens rea and the evidence linking the client to each element. Financial records are read with contracts, program files, travel, translations and communications rather than in isolation. Where classified information, foreign intelligence or protected sources may affect the case, he coordinates the appropriate procedures and qualified counsel while protecting the client’s ability to test the evidence.
A material-support case must be analyzed element by element. Labels attract attention; admissible evidence decides what the law can actually reach.
How Daniel works
Daniel is particularly attentive to the difference between context and culpability. Humanitarian, academic, journalistic, family or commercial contacts can appear suspicious when stripped of timing and purpose. His investigations therefore recover the surrounding facts and identify the documents or witnesses that can verify them. When engagement with prosecutors is useful, the presentation is narrow, sourced and tied to the legal issue. When litigation is necessary, the same disciplined record supports motions, expert work and witness preparation.
Every matter begins with a defined scope, conflicts clearance and an agreed communications protocol. The team identifies urgent deadlines, relevant agencies, custodians, systems and jurisdictions. Confirmed facts are separated from reasonable inferences and open questions. That distinction is maintained in board materials, government submissions and internal work product so the client can make decisions without confusing an investigative lead with a legal conclusion.
Daniel works closely with the firm’s defense, compliance, sanctions and policy leads. This integrated approach is important because one fact may be viewed differently under the material-support statutes, the Bank Secrecy Act, OFAC authorities, a contractual risk standard or a foreign-law restriction. Workstreams are coordinated, while privilege, professional duties and local-law responsibilities remain clear.
Focus areas
- Material-support defense, conspiracy analysis and federal national-security litigation
- Grand-jury strategy, interviews, proffers, subpoenas and search-warrant response
- Knowledge, intent, attribution, designation timing and evidentiary challenges
- Foreign-language communications, overseas witnesses and mutual legal assistance
- Coordination of criminal defense with sanctions, compliance and public-response decisions
Representative experience
Representative experience includes urgent response to government process; privileged reviews of transactions, communications and control decisions; preparation of witnesses and decision-makers; and development of clear submissions for prosecutors, regulators, sanctions authorities, boards and counterparties. Client confidentiality is maintained throughout every engagement, and prior experience does not guarantee a future result.
A matter may begin when a client receives parallel questions from a financial institution and government authority. Daniel would organize the request set, preserve the evidence, identify the governing legal standards and develop a sequenced response. Where technical analytics, foreign law or specialized accounting is required, he defines the question and integrates qualified experts or local counsel into the legal work plan.
A related assignment may begin when an institution discovers a control weakness while reviewing a terrorism-related alert. The immediate work is to understand the transaction and prevent avoidable harm; the longer work is to determine scope, root cause, reporting implications and sustainable remediation. Legal defense and compliance improvement are coordinated so the record is accurate and the organization can demonstrate what changed.
Education and professional background
Education: Stanford Law School, J.D. (2001). Prior public service: Fifteen years in the Department of Justice Counterterrorism Section, including service as Section Chief. Professional focus: Material-support defense, grand-jury investigations and national-security litigation.
For an engagement inquiry, use the firm’s central confidential intake page. Individual contact numbers are not published. Do not send classified information, suspicious activity reports, privileged files or sensitive identity documents before the firm confirms an engagement and provides transfer instructions.
