Skip to main content

Andrew W. Piltser Cowan

Attorney Profile

Top Rated Criminal Defense Attorney in Boston, MA

PiltserCowan Law LLC
25 Bay State Rd, 2nd Floor
Boston, MA 02215
Phone: 617-804-7228
Selected to Rising Stars: 2019 - 2022
Licensed in Massachusetts Since: 2008
Practice Areas: Criminal Defense, Criminal Defense: White Collar, Estate Planning & Probate, Estate & Trust Litigation
Languages Spoken: English, German
Attorney Profile

Andrew W. Piltser Cowan is a criminal defense attorney in Boston, Massachusetts. The founder of PiltserCowan Law LLC, Mr. Cowan represents people accused of criminal offenses involving domestic violence, drug violations, sex offenses, white collar crimes and other charges, ranging from misdemeanors to major felonies. He serves clients throughout Suffolk and Middlesex counties in Massachusetts.

Mr. Cowan has been practicing law for over a decade, and he has established a reputation as a diligent and tenacious advocate for his clients. He has experience at many levels of the Massachusetts court system and is knowledgeable about each stage of the criminal defense process.

Prior to forming PiltserCowan Law, Mr. Cowan worked for several years as a public defender and a superior court specialist with the public defender’s office in Dedham, Massachusetts. He opened his own criminal defense practice in 2013.

Mr. Cowan received a bachelor’s degree in physics and astronomy, with a minor in German, from The University of Iowa. He went on to graduate cum laude from Cornell Law School in Ithaca, New York, with a concentration in advocacy. While in law school, he received various academic awards and a letter of commendation from the Louisiana Supreme Court for volunteer legal work after Hurricane Katrina.

Following his graduation from law school, Mr. Cowan passed the Massachusetts bar examination and received his license to practice law before all Massachusetts state courts. He is a member of the Massachusetts Bar Association and the American Bar Association. In 2012, his alma mater, Cornell Law School, presented him with its “Rising Star Award” for exemplary public service.

Practice Areas
  • 50%Criminal Defense
  • 20%Criminal Defense: White Collar
  • 20%Estate Planning & Probate
  • 10%Estate & Trust Litigation
Focus Areas

Arrest & Arraignment, Assault & Battery, Criminal Fraud, Criminal Law, Drug & Alcohol Violations, Expungement, False Accusations, Felony, Misdemeanor, Motor Vehicle Offenses, Murder, Probation, Sex Offenses, Theft, Traffic Violations, Criminal Domestic Violence, White Collar Crime, Criminal Law - Federal, Estate Planning, Guardianships & Conservatorships, Living Wills, Power of Attorney, Probate & Estate Administration, Trusts, Wills, Will Contests


4 Years Rising Stars
  • Rising Stars: 2019 - 2022

About Andrew W. Piltser Cowan

First Admitted: 2008, Massachusetts

Professional Webpage:

Pro bono/Community Service

  • I am a corporate member and volunteer counsel to Arisia, Inc., a nonprofit that puts on New England's largest and most diverse science fiction convention.  After a sexual abuse scandal in the fall of 2018, I joined the corporate membership and began working (with many others) on helping to revamp the organization's policies and procedures for handling misconduct allegations.  In 2019, I served as one of two laisons between the organization's Incident Response Team and The Watch (which handles more general safety issues around the convention).  I also assist the organization in obtaining and interpreting legal documents relevant to incidents they are investigating, and drafted a successful bylaws amendment to bring our procedures for expelling members in line with state law.
  • Volunteer, Hurricane Katrina, Pro Bono Project of New Orleans
  • Active member of Occupy Boston Legal Working Group (through the National Lawyers' Guild)., 2012

Educational Background

  • Bachelor of Science, Physics and Astronomy, Minor: German, University of Iowa, 2005


  • Awarded annually to the Cornell Law student or students who made the greatest contributions during their law school career to civil-human rights., Freeman Award for Civil-Human Rights, Cornell Law School, 2008
  • CALI Excellence for the Future Award in Federal Jurisdiction, Cornell Law School
  • For outstanding contribution to the Occupy Boston Legal Working Group, Certificate of Achievement, National Lawyers Guild Massachusetts Chapter, 2012
  • Granted annually to a single alum.  Awarded at the Cornell Club in New York, February 10, 2012., Rising Star Award for Exemplary Public Service, Cornell Law School, 2012
  • Acknowledging generous donation of legal expertise and dedication to the victims and families affected by Hurricanes Katrina and Rita, Louisiana Supreme Court, 2007

Bar/Professional Activity

  • MCLE and CPCS Training Presentations including: Law of Evidence (2014-2018 multiple times per year) Scientific Evidence in Drug Cases (2013-2014) Superior Court Criminal Discovery (2015-2016) Identification Issues in Criminal Cases (2014) Probation Violations in the District Court (2014) Technical Evidence in Probation Violation Hearings (Norfolk and Plymouth Bar Advocates 2017), 2013


  • Series of videos produced in house on how we approach criminal defense, and how citizens should handle interacting with the police., Criminal Defense Video Series, 2017


  • Client's former student sought a restraining order against him, accusing him of rape.  I put together a cross-examination based on 3,000 pages of text messages exchanged between the two and persuaded the judge not to credit her testimony despite the very low bar in restraining order cases., 2019
  • Client's wife filed a restraining order, in the opening salvo of their divorce, alleging that he had forced her to engage in a variety of sexual acts.  I was able to review thousands of pages of online messages to show that she was a willing and enthusiastic participant in the acts she claimed to have been forced into.  As a result, the judge denied her application for a restraining order., 2019
  • Intellectually disabled client indicted for exchanging sexually explicit messages online with a minor.  After years of litigation, I was able to persaude the cout to find him not competent to stand trial, and then persaude the ADA to drop the charges based on his disabilities., 2018
  • Negligent operation of a motor vehicle complaint dismissed on motion despite very serious injuries due to police failure to timely issue a citation., 2017
  • Represented a decedent's unmarried life partner who was accused of unduly influencing the decedent to leave her his home and 80% of financial assets.  Settled for a prior draft of his estate plan in which my client received the home and 50% of financial assets., 2016
  • Required finding of not guilty after 3-day Superior Court jury trial for a woman who was indicted for drug distribution based solely on her husband's conduct., 2015
Show More
Office Location for Andrew W. Piltser Cowan

25 Bay State Rd
2nd Floor
Boston, MA 02215

Phone: 617-804-7228

Last Updated: 5/15/2022

Page Generated: 0.57840609550476 sec