Founding partner · Trial counsel

Jeffrey A. Denner

Boston-based defense counsel and civil-rights litigator with a trial-first reputation—seasoned in investigations, courtroom advocacy, appeals, and administrative proceedings.

  • Yale College
  • Harvard Law School
  • Massachusetts & federal courts
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Portrait of Jeffrey A. Denner

Professional biography

For more than fifty years, Jeffrey A. Denner has concentrated on complex criminal defense, civil rights, and select civil disputes—carrying matters from pre-charging investigations through trial, sentencing, appeal, and collateral review.

50+Years in practice
10k+Matters handled
FederalMulti-district experience
TrialFirst-chair focus

His work spans coordinated investigations, witness preparation, motion practice, jury trials, and parallel administrative/licensing fronts. Clients engage him when exposure is career-ending, liberty-threatening, or reputational—and when they need senior lawyers who stay in the courtroom rather than delegating to juniors.

Mr. Denner is known for disciplined staffing, early integration of investigators and forensic experts, and narratives built to withstand press scrutiny as well as judicial review.

“The Criminal Defense Lawyer is the last bastion of freedom in this country”—a principle drawn from the National Association of Criminal Defense Attorneys that has anchored Mr. Denner’s practice for decades.

Education includes Yale University and Harvard Law School. Admissions and representative matters beyond those listed publicly are discussed during confidential consultation.

White collar Violent & sensitive felony defense Civil rights Appeals & post-conviction

Media & commentary

Selected appearances and profiles—offered as context for how courts and the press intersect in high-visibility defense work.

Day Three of the ‘Whitey’ Bulger Verdict Watch (Greater Boston) Mystery surrounds kidnap trial of German-born man Excerpt From “Behind Closed Doors” — Clark Rockefeller Extra: Did the Gerhartsreiter jury get it right? MSNBC interview on federal civil rights lawsuit Lawyer Jeffrey Denner Talks Edwin Alemany Trial Jeffrey Denner and VB (Fox25) — Whitey Bulger, Mark Kerrigan, and More Jeffrey Denner and Brad Bailey Discuss Tim Cahill Mistrial CNN interview with Jeffrey Denner on Nancy Grace Greater Boston interview on wrongful death lawsuit The man who calls himself Clark Rockefeller’s lawyer (Massachusetts Lawyers Weekly) LaBarre has top-gun attorney (Seacoast Online) Rockefeller’s Lawyer Says He’s Not Kidnapper, Just Insane (ABC News) Firm to pay $16 million in fatal Big Dig collapse (NBC News) Can marathon bomb suspect get a fair trial? (The Guardian)

How engagements are structured

Primary focus

Criminal defense, civil rights litigation, and complex appellate proceedings.

Client communication

Direct partner access, disciplined budgets, and plain-language risk assessments.