Founding partner
High-stakes litigation · Massachusetts & federal courts · Boston · 24/7 urgent intake
Trial counsel when reputation, freedom, and legacy are on the line
Denner Lamanna represents executives, professionals, and families in high-profile civil, civil rights, catastrophic injury, and enterprise disputes that draw institutional scrutiny and press attention. Led by founding partners Jeffrey A. Denner and Jennifer Lamanna, we bring together first-chair trial lawyers, investigators, and subject-matter experts in one command structure, so your case is built for the courtroom from day one—not for a quick handoff.
24/7
Partner-accessible coverage when agencies or headlines move
National
Complex matters staffed from Boston across federal and multistate forums
Bench depth
Investigators, forensics, and experts for document-intensive trials
Massachusetts trial counsel
Trial Counsel for High-Exposure Litigation
- Partner-led matters
- Trial-ready preparation
- Discretion-first intake
Denner Lamanna is a Massachusetts litigation firm for consequential civil, civil rights, and reputational matters—high-profile disputes where the stakes extend far beyond a single courtroom episode. Select criminal mandates are accepted where they intersect regulatory, professional, or public-order strategy the firm already handles at trial depth.
A Practice Defined by Consequence
Denner Lamanna does not operate as a volume-driven firm. The practice is intentionally selective, allowing every matter to receive direct senior-level involvement from case assessment through resolution.
Clients retain the firm when the litigation is complex, the visibility is significant, or the outcome carries lasting implications.
The firm handles matters involving:
- Civil rights and constitutional accountability litigation
- Catastrophic injury, wrongful death, and malpractice exposure
- High-conflict business and partnership disputes
- High-net-worth divorce and parallel financial or reputational risk
- Appellate litigation and emergency injunctive relief
- Sensitive family and custody disputes involving parallel litigation risk
- White collar and government-facing investigations (often alongside civil strategy)
- Complex criminal defense where intake aligns with firm bandwidth
- Crisis management and pre-charge representation
Strategic Litigation, Not Reactive Litigation
Every dispute carries both legal and practical consequences. Denner Lamanna approaches litigation as a strategic exercise in leverage, positioning, and outcome control—not simply motion practice.
The firm is designed to move effectively in matters that evolve quickly, attract attention, or require coordinated legal strategy under pressure.
Whether resolving disputes quietly or litigating aggressively through trial and appeal, the objective remains consistent: protect the client’s position with precision, preparation, and force.
Discretion Is Part of the Representation
Many clients seek counsel not only for courtroom advocacy, but for judgment. Denner Lamanna represents individuals, executives, professionals, and businesses that require sophisticated representation delivered with discretion and strategic discipline.
The firm understands that in certain matters, reputation, confidentiality, and timing can be as important as the litigation itself.
The civil practice pairs personal injury and wrongful death prosecution with institutional-strength budgets for catastrophic harm, including medical malpractice, construction disaster, and workplace fatality claims. Parallel civil rights enforcement addresses Section 1983 liability, wrongful prosecution, and law enforcement misconduct. High-net-worth divorce, business litigation implicating enterprise value and reputational harm, and military justice under the UCMJ complete a trial-first platform for clients who expect discretion, velocity, and uncompromising preparation.
Intake is intentionally selective: prospective clients receive candid guidance on fit, conflicts, and sequencing before engagement letters issue. To explore representation in a high-stakes or complex controversy, request a confidential review or contact our Boston lines directly. Navigate practice disciplines, frequently asked questions, or representative outcomes and coverage.
High-stakes trial counsel · Boston
Attorneys
Biographical snapshots of the lawyers steering Denner Lamanna—a Boston litigation boutique retained for high-profile, high-stakes civil and reputational disputes where institutional credibility, liberty, licensure, or legacy capital is contested from preliminary injunction through appeal.
- Practice footprint
- Massachusetts state & federal courts; national docket where licensing permits
- Matter mix
- Civil rights & catastrophic injury, enterprise & family disputes, military justice; criminal & white collar (select intake)
- Urgent intake
- High-stakes matters routed quickly—same-day response when appropriate
Founding partners
Full profiles cover credentials, representative matters, and how each partner prepares complex cases for the courtroom.
Associates
Placeholder entries below reserve space for counsel profiles. Replace names, practice lines, and imagery when biographies are ready.
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Associate · Criminal defense
Investigations, charging decisions & trial support
Profile forthcoming.
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Associate · Civil litigation
Discovery, motions & appellate briefing
Profile forthcoming.
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Associate · Injury
Serious injury, wrongful death & damages models
Profile forthcoming.
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Associate · Civil rights
Police misconduct, discrimination & federal civil rights actions
Profile forthcoming.
Counsel & associates
Associate placeholders above will be swapped for full biographies as they are published. If you are evaluating counsel for a serious, high-stakes, or complex matter, start with a confidential conversation—we will tell you honestly whether our firm is the right fit.
Confidential case review
Priority is accorded to mandates implicating liberty, professional licensure, or generational wealth. Substantive inquiries receive disciplined follow-through—frequently same-day for urgent criminal defense and civil rights escalations.
Thank you — we received your request
A member of our team will follow up shortly. If your matter is urgent, please call (617) 886-5188 or toll free (866) 348-0900.
Practice disciplines
Each high-stakes or complex mandate is staffed for trial and appellate contingencies in Massachusetts state courts, the Commonwealth’s federal districts, and forums nationwide where admission rules permit direct representation or coordinated local counsel—with workflows scaled for document-intensive, publicly scrutinized controversies.
Civil rights
Section 1983 litigation, institutional discrimination, excessive force, unlawful detention, wrongful prosecution, and government overreach defended or prosecuted with appellate fluency.
Personal injury & wrongful death
Catastrophic motor vehicle, aviation, and trucking losses; medical malpractice; workplace and construction mortality; premises liability; and cross-border disputes prosecuted in Massachusetts and New York with damages models proportionate to severity.
Divorce & family law
High-net-worth dissolution, tracing and valuation of closely held enterprises, custody and support architectures, relocation, injunctive relief, and discreet resolution of sensitive interpersonal exposures.
Business litigation
Fiduciary litigation, contract and trade-secret controversy, employment severance conflicts, real property disputes, and transactional counseling where eventual trial posture informs negotiation strategy.
Military law
Court-martial defense, Article 15 boards, administrative separation, discharge upgrades, and parallel civilian counseling synchronized under the UCMJ.
Criminal defense
Select defense of state and federal prosecutions, parallel regulatory inquiries, and licensing-adjacent exposure—where criminal process is one dimension of a broader high-stakes dispute.
Representative visibility & outcomes
In high-profile, high-stakes litigation, prosecutors, regulators, and journalists converge—and courtroom credibility is inseparable from written advocacy and forensic discipline. Founding partners Jeffrey A. Denner and Jennifer Lamanna, together with Boston-based colleagues, have stewarded matters bearing on fiduciary institutions, public bodies, professional reputations, and liberty itself. Reported results furnish context only; they neither forecast nor guarantee future performance.
Coverage alongside journalism in
- Boston Herald
- The New York Times
- MSNBC
- The Wall Street Journal
- CNN / CNN International
- Law & Crime
- The Guardian
- Channel 4 (UK)
Notable victories
State Treasurer case
State Treasurer corruption
Commonwealth of Massachusetts vs. Timothy Cahill
Mistrial declared, all charges dismissed
Big Dig case
Big Dig tunnel collapse
Estate of Del Valle v. Multiple Defendants
$28.1 million awarded
Murder case
High-profile murder case
Commonwealth of Massachusetts v. Edmund Burke
All charges dismissed + $400K award
Police officer case
Federal police officer trial
U.S. vs. LaFleur
Not guilty verdict
Additional representative outcomes
Illustrative matters drawn from public reporting connected to Denner Lamanna leadership in Massachusetts trial and appellate courts. Each caption rests on its unique factual matrix and governing law.
- College athlete acquittal — Middlesex Superior Court. Acquittal of a Division I college athlete on sexual assault allegations; defense employed Massachusetts “first complaint” / fresh complaint doctrine and related trial strategy. Result: Acquitted.
- Major embezzlement — federal sentencing. Defense in one of the largest reported private-sector embezzlement matters in Massachusetts history; sentencing positioned against substantial guideline exposure. Result: 48 months with substance programming; parole eligibility discussed in public reporting.
- Harvard-affiliated prosecution — appeals. Trial court instructions on intoxication and consent challenged on appeal in a high-exposure prosecution. Result: Appeals court reversed conviction (reported).
- Federal sting — money laundering allegations. Trial defense in an alleged undercover luxury-vehicle / money-laundering scenario. Result: Not guilty verdict (reported).
- Civil rights / wrongful prosecution themes. Matters involving dismissed charges and civil recovery have been reported in connection with high-profile Massachusetts criminal cases; each civil outcome depends on its own record.
Further narrative detail is available through confidential intake with firm counsel.
Attorney advertising. Prior results do not guarantee a similar outcome. Verdicts, dismissals, and awards depend on unique facts, witnesses, judges, juries, and applicable law.
Engagement architecture
Each high-stakes relationship proceeds through controlled phases—from preliminary diligence through pleadings, discovery, and calendar-ready trial preparation—without delegating strategic judgment to revolving junior tiers.
Confidential intake
Telephone or encrypted web intake captures predicate facts and urgency. Where governmental authority executes arrest, search, or compulsory process, deployment is immediate.
Strategic assessment
Partners analyze conflicts, jurisdictional leverage, and reputational exposure. Clients receive crisp option memoranda rather than opaque reassurance.
Trial-first preparation
Upon engagement, investigators, forensic economists, and specialty experts integrate with motion practice under verdict-grade timelines, preserving dismissal, settlement, or contested adjudication as parallel hypotheses.
Investigator & expert bench
Complex mandates demand interdisciplinary fluency. The firm maintains disciplined relationships with investigators, forensic scientists, behavioral specialists, and financial analysts whose testimony withstands Daubert scrutiny and aggressive cross-examination.
Private investigators
Vetted professionals specializing in witness development, surveillance protocols, and documentary recovery tailored to criminal defense and civil enforcement objectives.
Forensic specialists
Laboratory and field experts addressing biometric evidence, trace materials, ballistics, and chain-of-custody vulnerabilities.
Forensic psychologists
Competency, mitigation, and damages evaluations presented through Frye- and Daubert-ready methodologies.
Cyber specialists
Digital forensic examiners supporting computer crime allegations, incident response, and authentication of electronically stored information.
Accident reconstruction
Engineers modeling collision dynamics, roadway design failures, and occupational catastrophes.
Financial experts
Forensic accountants and economists tracing fraudulent transfers, calculating guideline exposure, and presenting damages with appellate durability.
Frequently asked questions
Orientation for clients, fiduciaries, and referring counsel evaluating counsel for high-stakes or complex litigation. These summaries are informational only and do not constitute advice respecting any particular controversy.
What types of cases does Denner Lamanna handle?
Counsel concentrate on high-profile, high-stakes complex litigation: sophisticated criminal defense including white collar and federal enforcement; catastrophic personal injury and wrongful death; civil rights and police misconduct; divorce and family disputes with balance-sheet complexity; enterprise and fiduciary litigation; and military justice. Mandates routinely integrate investigators and discipline-specific experts scaled to trial risk.
Is the initial consultation confidential?
Yes. Preliminary inquiries are treated as confidential. Contact alone does not establish an attorney-client relationship until confirmed in writing; communications are nevertheless handled consistent with applicable ethical obligations and firm protocols.
Does the firm handle cases outside Massachusetts?
Headquartered in Boston, members maintain active matters in national forums where licensing and ethics rules permit direct representation or coordinated admission with local counsel. Capacity is assessed discreetly for each mandate.
What should I do first if I am under investigation or arrested?
Decline substantive discussion with investigators until counsel is secured. Immediate contact permits preservation of privileges, evidence, and charging posture from the first interaction.
Do you handle federal criminal cases in Massachusetts?
Yes. The firm defends federal prosecutions and parallel civil proceedings, including fraud, money laundering, computer crimes, and complex regulatory overlays tried in the District of Massachusetts and reviewed on appeal.
How does Denner Lamanna differ from a general practice firm?
The practice is selective by design—focused on high-stakes exposures touching liberty, professional license, legacy capital, and institutional reputation in matters that are technically complex, publicly sensitive, or both. Files are structured for chamber-ready preparation and trial-grade discipline rather than sequential delegation through inexperienced tiers.
Where are your Boston law offices located?
Principal offices are maintained in Boston, Massachusetts. Routing, attendance, and service coordinates are furnished to engaged clients and referring counsel.
Do you represent clients in personal injury and wrongful death matters?
Yes. Counsel prosecute serious injury and wrongful death claims in Massachusetts and New York, including motor vehicle catastrophe, medical malpractice, workplace and construction disaster, and premises liability.
Can you help with police misconduct and civil rights claims?
Yes. Representation spans excessive force, unlawful arrest, wrongful prosecution, discrimination, and cognate constitutional claims pursued through trial and appellate courts.
Do you defend military members facing court-martial or administrative separation?
Yes. Services include court-martial defense, Article 15 proceedings, administrative separation, discharge upgrades, and related military justice counseling coordinated with civilian strategy.
What languages does the firm support for clients?
English, Spanish, Portuguese, and Russian are supported in-house; interpreters are arranged whenever a mandate requires additional linguistic coverage.
How do I request a confidential case review?
Submit the confidential intake form or telephone the Boston or toll-free lines. There is no fee to inquire; responses are sequenced according to urgency and subject-matter fit.