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Finnegan
Jason D. Tulley
Partner
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  • 901 New York Avenue, NW
  • Washington, DC 20001-4413
+1 202 408 4082
jason.tulley@finnegan.com jason.tulley@finnegan.com

Jason D. Tulley

Partner

  • +1 202 408 4082 +1 202 408 4082
  • jason.tulley@finnegan.com jason.tulley@finnegan.com
  • 901 New York Avenue, NW
  • Washington, DC 20001-4413
  • vCard

Across thirty years of litigating, Jason Tulley has had nearly 60 jury trials. Almost all the trials were against the U.S. Attorney’s Office for the District of Columbia and involved serious felonies with complex forensic science issues. In his more than 20-year career at the Public Defender Service for D.C. (PDS), the nation’s premier public defender, Jason served in several roles, including as special counsel for forensics and expert witnesses, litigating over 30 areas of forensic science both in pre-trial admissibility and before juries. He continues to serve as a jury expert and trains attorneys and experts around the country on forensic and science litigation. Jason is currently on the faculty of Harvard Law School’s Trial Advocacy Workshop, where he specializes in directing and crossing expert witnesses in jury trials.

Jason served in several capacities at the PDS, including as a supervisor for fourteen years. He tried all levels of cases, from juvenile through major felony to the most complex murder cases, such as insanity defenses and shaken baby syndrome allegations. More recently, Jason has tried only homicide cases in the trial division at the PDS. He won four of his past five homicide trials in that time (with the fifth pending appeal) and successfully managed to have eleven other murder cases dismissed against his clients in the pre-trial stage, either by judicial ruling or convincing the government to drop the case through aggressive litigation, which often involved expert and forensic issues.

 

As the training director at PDS, Jason instructed new attorneys at the agency as well as private attorneys seeking appointment in criminal cases about all aspects of D.C. Superior Court litigation. In his role as special counsel to the director for forensics and expert witnesses at PDS, he led the organization’s nationally recognized Forensic Practice Group, which focuses on litigation of science issues from all aspects of DNA to cell tower technology to biomechanical engineering to neuropathology , while also managing the agency’s budget for expert witnesses. Jason often attended science conferences to better understand and educate the attorneys and experts on the scientific principles involved in forensic litigation.  Jason also brought forth impact litigation cases to the office, such as litigating Sixth Amendment Fair Cross Section claims and DC’s series of DNA exonerations. He is past chair of the National Association of Criminal Defense Lawyers’ (NACDL) Forensic Science Committee, where he worked on a national level to ensure scientifically sound forensic practices and education for the defense bar in all forensic disciplines.  

 

Prior to working at PDS, Jason was a deputy capital defender in the trial division of New York’s Capital Defender Office, where he represented indigent persons facing death penalty charges. He was also an associate with a small Maryland law firm that handled state and federal civil and criminal cases, including a substantial capital defense practice. Immediately following law school, he clerked for the Honorable Theodore Bloom on the Court of Special Appeals of Maryland. Jason was born and raised in the Bronx, New York, and held his first job at thirteen selling sodas in stands of Yankee Stadium.

 

Et Cetera

  • Order of the Coif 1995.

  • Recipient, seven American Jurisprudence Awards, Property I & II, Contracts I & II, Evidence, Criminal Law, Constitutional Law, 1992-1995.

  • President, Maryland Public Interest Law Project, 1994-1995.

  • Recipient, Public Service Award, University of Maryland School of Law, 1995.

Experience

Promptu Systems Corporation v. Comcast Corporation

Contributed to Finnegan’s trial team in securing a $240 million jury verdict and a finding of willful infringement in a patent case against Comcast, assisting with the preparation of fact and expert witness cross‑examinations and conducting rigorous mock examinations to strengthen trial presentation.

2:16-cv-06516, E.D. Pa., Judge Sanchez
22-1939, Fed. Cir., Judges Prost, Moore, Taranto

News

Award/Ranking

61 Finnegan Attorneys Recognized on the 2025 Capital Pro Bono Honor Roll 61 Finnegan Attorneys Recognized on the 2025 Capital Pro Bono Honor Roll

May 7, 2026

Press Release

Pro Bono: Finnegan Obtains Dismissal of Homicide and Related Charges Against DC Man Pro Bono: Finnegan Obtains Dismissal of Homicide and Related Charges Against DC Man

June 13, 2025

Professional Activities

  • American Academy of Forensic Sciences (AAFS)
    (associate member, Jurisprudence Section, 2026-present)
  • The Bail Project
  • National Association of Criminal Defense Lawyers
    (past chair, Forensic Science Committee)
  • Harvard Law School Trial Advocacy Workshop
    (faculty)
Admissions and Education

Admissions

  • District of Columbia

Education

University of Maryland School of Law
J.D., 1995
State University of New York at Binghamton
B.A., Sociology, 1992

Jason's Practices

Global IP Enforcement, Litigation, and Trials
Branded Hatch-Waxman (ANDA) Litigation and Trials
ITC Section 337 Investigations and Trials
Patent Litigation and Trials
Pretrial Strategies
PTAB Invalidation Proceedings: IPR and PGR
Trade Secrets
Patent Office Invalidation Proceedings
PTAB Invalidation Proceedings: IPR and PGR
Prosecution and Portfolio Management
Trade Secrets

Jason's Industries

AI, Electronics, and Information Technology
Electronic Devices and Components
Chemicals, Industrials, and Materials
Chemical
Life Sciences
Medical Device and Diagnostics
Pharmaceutical

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