Ryan Sullivan is a criminal defense attorney based in Andover, Massachusetts. He is known in Lowell District Court, Lowell Superior Court, Lawrence District Court, and Salem Superior Court — courts where he has built a reputation over two decades as one of the most respected and formidable defense attorneys in the Merrimack Valley.
In 2025, the Greater Lowell Bar Association awarded Ryan the Normand D’Amour Attorney of the Year Award — the association’s highest recognition for a practicing attorney, given for professional excellence, courtroom reputation, and contribution to the legal community. It is not a self-nominated award. It is given by peers.
Before becoming a defense attorney, Ryan served as a prosecutor in the Middlesex County District and Superior Courts — where he was recognized as an award-winning prosecutor for the quality and success of his trial work. He left the prosecution side with something most defense attorneys never have: a precise understanding of how the Commonwealth constructs a case, and exactly where it can be dismantled.
Ryan Sullivan grew up in Tewksbury, Massachusetts, with deep roots in the Merrimack Valley. His family has been part of this community for generations — his grandfather served as a state representative for the region, his great-uncle was the Tewksbury Chief of Police (the new police station bears his name), and his father was a columnist for the Lowell Sun for years, writing about the community Ryan would go on to serve as a lawyer.
Ryan didn’t end up practicing in Lowell and Lawrence by accident. He grew up watching the Merrimack Valley’s courts, institutions, and people. He knows the region — its history, its challenges, and its character — in a way that cannot be learned from a firm bio. When clients in Lowell call him, they’re not calling a suburban attorney who occasionally appears in the Lowell courts. They’re calling someone who grew up here.
Ryan began his legal career as a prosecutor in the Middlesex County District Attorney’s Office, appearing in both the Middlesex County District Courts and Middlesex Superior Court. He was recognized for the quality and success of his trial work — receiving the John Droney District Court Award, given for exemplary service in the district courts of Middlesex County and nominated by his peers. Former Middlesex District Attorney Gerard T. Leone said: “Ryan is a dedicated lawyer and truly valued colleague. He was a clear choice for the John Droney District Court Award, as nominated by his peers.”
His prosecution experience gives him an insider’s advantage that is genuinely rare: he has been in the room where charging decisions are made, where trial strategy is developed, and where deals are offered and declined. He knows how prosecutors think about cases — not as an observer, but as someone who did that work. That knowledge is what he brings to the defense of every client.
Both Ryan and his partner Murat Erkan began their careers as prosecutors in the busiest courts in the Commonwealth before building a firm known for uncompromising defense. Together they bring more than forty years of combined experience — including extensive prosecution and defense work in Middlesex and Essex counties.
Since the U.S. Supreme Court’s 2022 decision in New York State Rifle & Pistol Association v. Bruen and the SJC’s 2023 ruling in Commonwealth v. Guardado, Massachusetts firearms defense has changed fundamentally. The burden of proof shifted: the Commonwealth must now prove lack of a valid license as an essential element of the crime.
Ryan has been litigating at the front edge of this area. He developed a corroboration argument — grounded in Commonwealth v. Forde, Commonwealth v. Leonard, and Commonwealth v. Latimore — challenging the Commonwealth’s ability to prove essential elements through an uncorroborated admission alone. He has used this argument to obtain three acquittals in gun possession cases where the defendant had admitted the gun was theirs. One of those cases was featured on the Another Not Guilty podcast, a national criminal defense podcast.
Most Massachusetts gun cases are won or lost before trial through suppression motions. Ryan has been on both sides of these arguments — as a prosecutor drafting search warrants for police in Middlesex County, and as a defense attorney challenging them. He knows precisely where searches go wrong, and he presses those arguments hard.
A suppression motion in a firearms case resulted in the Commonwealth filing a Nolle Pros the morning of the scheduled suppression hearing — after the ADA reviewed BPD’s own inventory policy against the motion. Without that evidence, the case was dismissed.
Ryan handles post-conviction cases for non-citizen defendants who were given wrong immigration advice by prior counsel. Under Padilla v. Kentucky, Clarke, and DeJesus, defense attorneys are constitutionally required to advise non-citizen clients of the specific immigration consequences of a guilty plea. When they fail — or give actively wrong advice — the plea can be vacated.
Ryan has vacated pleas that other attorneys could not. In one case, the same prosecutor’s office that successfully opposed a prior motion to vacate conceded Ryan’s motion when presented with the full factual and legal record he built.
Ryan handles Massachusetts appellate matters in the Appeals Court and Supreme Judicial Court, including interlocutory Rule 15(a)(2) petitions and post-conviction motions for new trial. He is co-chair of the Legislative Committee of the Massachusetts Association of Criminal Defense Lawyers (MACDL), where he advocates before the Massachusetts Legislature on bills affecting criminal defendants across the Commonwealth.
Ryan has been quoted by the Associated Press in two major immigration enforcement cases. In April 2025, he was quoted in national AP coverage of the ICE courthouse abduction of his client Wilson Martell-Lebron, who was seized by federal agents while his jury trial was actively underway at Boston Municipal Court. Ryan called the action “reprehensible” and filed a motion to dismiss with prejudice.
Ryan was also quoted in a separate AP story covering the detention of Juan Francisco Mendez in New Bedford, where ICE agents smashed a car window to seize a man they later claimed was not their intended target. Ryan secured a federal court order requiring the government to provide 72-hour notice before moving his client.
Ryan appears throughout Massachusetts, with particular depth and established relationships in:
Associated Press — Quoted in national AP coverage of the ICE courthouse abduction of defendant Wilson Martell-Lebron during an ongoing jury trial at Boston Municipal Court (April 2025, byline Michael Casey). Called the government’s actions ‘reprehensible.’
Associated Press — Quoted in national AP coverage of ICE agents detaining a New Bedford man whose car window was smashed. Secured federal court order requiring 72-hour notice before client transfer (April 2025).
Another Not Guilty Podcast — Featured episode: Ryan Sullivan casts doubt on his client’s confession to win an acquittal on all charges in a gun possession case. The defendant faced a mandatory minimum sentence. The jury found him not guilty. anothernotguiltypod.com
Massachusetts Lawyers Weekly — Covered in multiple reports on Massachusetts appellate decisions and significant trial outcomes.
If you’re facing criminal charges in Lowell, Lawrence, Salem, or anywhere in Essex or Middlesex County — call Ryan Sullivan. You’ll speak to the attorney directly.
(978) 474-0054 | Available 24 hours | es.legal/contact-us
Ryan Sullivan is a criminal defense attorney based in Andover, Massachusetts. He is known in Lowell District Court, Lowell Superior Court, Lawrence District Court, and Salem Superior Court — courts where he has built a reputation over two decades as one of the most respected and formidable defense attorneys in the Merrimack Valley.
In 2025, the Greater Lowell Bar Association awarded Ryan the Normand D’Amour Attorney of the Year Award — the association’s highest recognition for a practicing attorney, given for professional excellence, courtroom reputation, and contribution to the legal community. It is not a self-nominated award. It is given by peers.
Before becoming a defense attorney, Ryan served as a prosecutor in the Middlesex County District and Superior Courts — where he was recognized as an award-winning prosecutor for the quality and success of his trial work. He left the prosecution side with something most defense attorneys never have: a precise understanding of how the Commonwealth constructs a case, and exactly where it can be dismantled.
(978) 474-0054 
(978) 474-0080 