Deidre Brennan Regan


Brody, Hardoon, Perkins & Kesten, LLP
265 Franklin Street Street
12th Floor
Boston, MA 02110

Tel: 617-880-7100


Deidre Brennan Regan is Of Counsel with BHPK Law, specializing in appellate practice.

Since joining BHPK in 1995, Deidre has contributed significantly to numerous reported appellate decisions that have established critical precedents in various areas of civil rights, employment law, municipal law, and education law. With over thirty years of experience in litigation and appeals, Deidre has played an integral role in BHPK’s remarkably successful appellate track record.

A prolific writer, Deidre’s work focuses on legal research and writing in all phases of litigation, from pre-trial motions to appellate briefs. She is regarded for her exceptional research, analytical, and writing skills, as well as her prodigious knowledge of the state and federal appellate processes. She presently leads BHPKLaw’s Appellate law practice.

Deidre appears frequently before the First Circuit Court of Appeals, the Massachusetts Supreme Judicial Court, and the Massachusetts Appeals Court. Having started her career as a staff attorney for the Massachusetts Supreme Judicial Court, and then as a member of the appellate department at a large Boston-based law firm, Deidre’s passion has always been in the appellate arena. She is considered one of the most knowledgeable appellate practitioners in Massachusetts.

  • Suffolk University Law School, cum laude, J.D. (1988); Editor, Suffolk University Law Review
  • College of the Holy Cross, B.A. (1985)
Bar Admissions
  • First Circuit Court of Appeals
  • United States District Court for the District of Massachusetts
  • Commonwealth of Massachusetts
Memberships and Affiliations
  • Massachusetts Bar Association
  • Holy Cross Lawyers Association
  • Gray v. Cummings, 917 F.3d 1 (1st Cir. 2019) (First Circuit affirmed U.S.D.C.’s dismissal of mentally ill patient’s alleged claim of excessive force by law enforcement).
  • Summers v. Fitchburg, 940 F.3d 133 (1st Cir. 2019) (First Circuit affirmed U.S.D.C.’s entry of summary judgment for the City in ADA and Fair Housing Act violations related to housing codes).
  • Heagney v. Wong, 915 F.3d 805 (1st Cir. 2019) (after a jury awarded the plaintiff $2.3 million dollars in damages, the First Circuit reversed the award entirely, remanding the case in favor of the City and its former Mayor).
  • Angiuoni v. Town of Billerica, 838 F.3d 34 (1st Cir. 2016) (on appeal after a jury found in favor of the defendant client, the First Circuit adopted the burden of proof analysis advanced by the firm and affirmed the favorable verdict).
  • Hunt v. Massi, 773 F.3d 361 (1st Cir. 2014) (First Circuit upheld finding of qualified immunity in case of hand cuffing arrestee). *This ruling is often cited in cases and treatises on the “clearly established” prong of an immunity analysis.
  • McGrath v. Tavares, 757 F.3d 20 (1st Cir. 2014) (First Circuit upheld use of force against fleeing suspect who refused to stop and respond to police commands). *Cited in cases and treatises, including 38 Am. Jur. Trials 493, regarding use of force.
  • MacDonald v. Town of Eastham, 745 F.3d 8 (1st Cir.  2014) (First Circuit upheld finding of qualified immunity in case of warrantless entry based on emergency aid exception). *Cited in many cases and treatises, including 15 Am. Jur. 2d Civil Rights § 114.
  • Gianfrancesco v. Town of Wrentham, 712 F.3d 634 (1st Cir. 2013) (First Circuit upheld that proprietor of tavern failed to state substantive dueprocess claim for retaliation based on his opposition to client town policies).*Cited in 18 Mass. Prac., Municipal Law and Practice § 14.1 (5th ed.)
  • Cordi Allen v. Conlon, 494 F.3d 245 (1st Cir. 2007)*Seminal case frequently cited for its discussion and holding regarding an equal protection “class of one” claim. Cited in many cases and treatises, including 18 Mass. Prac., Municipal Law and Practice, § 14.1 (5th ed.).
  • Jarrett v. Town of Yarmouth, 331 F.3d 140 (1st Cir. 2003), cert. denied 540 U.S. 1017 (2003) (First Circuit upheld officer’s use of police dog to effectuate a stop of fleeing suspect). *Cited in many cases and treatises, including 31 Mass. Prac., Federal Civil Rights Act, § 13.19 (3d ed.)
  • Nieves v. McSweeney, 241 F.3d 46 (1st Cir. 2001) (First Circuit held that warrantless arrests cannot form the basis of a malicious prosecution claim where the arrests did not constitute the initiation of proceedings against them). *Cited in many cases and treatises, including 62Am. Jur. Trials § 547.
  • Cuddyer v. Stop and Shop Supermarkets, 434Mass. 521 (2001) *Cited as the seminal case to address the continuing violation doctrine in Massachusetts.