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O'Brien Law Boston

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Boston Criminal Lawyer

We are an experienced team of trial lawyers, with a distinguished record of providing superior legal advocacy, and a reputation for working tirelessly towards accomplishing the individualized goals of every single client. We understand that “success” means something different to every client.

–Attorney Frank O’Brien

Francis T. O’Brien, Jr. is “of counsel” to O’Brien Law Boston, and brings more than twenty-seven (27) years of experience in the area of criminal defense law. Attorney O’Brien is widely regarded among the most successful members of the Massachusetts criminal defense bar. Whether your case goes to trial or is resolved prior to trial, Attorney O’Brien has the judgment, knowledge and skill to deliver the best possible outcome in your case.

Since many arrests and criminal charges occur after regular business hours, a person facing criminal charges needs an attorney who is available and responsive whenever the need arises. Whether your case requires an immediate court appearance, or an after-hours meeting at a police station, jail, or other facility, Attorney Francis O’Brien and his associates are available to assist you.

Attorney O’Brien also has extensive appellate experience, including numerous appearances before the Massachusetts Supreme Judicial Court and the Massachusetts Appeals Court, and the Supreme Court of New Hampshire. Attorney O’Brien is admitted to practice before the U.S. District Courts (Federal) in the First, Second, Fourth, and Seventh Circuit Courts of Appeal.
Criminal Cases We Handle

Our practice group concentrates on all areas of criminal defense.  We have achieved outstanding results for out clients in cases involving drug crimes, vehicular homicide, driving to endanger, fraud, white collar crimes and crimes of violence including, murder, rape, date rape, domestic assault & battery and restraining order violations. In addition, Attorney O’Brien has extensive experience in criminal issues relating to search and seizure as well as issues arising in the defense of drunk driving and operating under the influence and is an expert on Melanie’s Law and the criminal penalties associated with the law. He also has years of experience handling clerk’s hearing as well as criminal appeals.

Having successfully handled hundreds of cases of individuals charged with operating under the influence (OUI) and other motor vehicle offenses, Mr. O’Brien also has considerable experience with OUI-related issues involving license suspensions and requests for license reinstatement. He frequently represents clients before the Registry of Motor Vehicles and Board of Appeal for the Registry.

Knowledge of The Law

Boston laws regarding criminal activity are complex and require an experienced lawyer with a thorough understanding of the letter of the law. Very often there are situations where mere technicalities can decide a case. It is these instances where the expertise and judgment of Francis T. O’Brien, Jr. can be of vital importance to your case.

Criminal Defense Fee Structure

There is no charge for an initial consultation or initial office visit. We charge a flat fee that varies based on the type of criminal case as well as depending on the complexity and nature of the case.

Speak with a Criminal Defense Lawyer

To speak with a highly experienced Boston criminal lawyer, contact us online or telephone Francis T. O’Brien, Jr. at O’Brien Law Boston twenty four hours, seven days a week, toll free at 617-512-0939. As a member of the Massachusetts and Florida state bars and the federal bar in Massachusetts, Mr. O’Brien has also represented clients on criminal, state and federal matters in more than twenty states. 

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Contact Attorney O’Brien

617 512-0939

fob@obrienlawboston.com

O’Brien Law Boston, P.C.

Boston Office
Suite 602
10 Tremont St
Boston, MA 02108

Hingham Office
738 Main Street
Hingham, MA 02043

OUR PRACTICE AREAS

  • Assault
  • Burglary
  • DUI
  • OUI
  • Drug Possession
  • Drug Trafficking
  • Clerk’s Hearings
  • Restraining Orders

BOSTON CRIMINAL DEFENSE LAWYER VIDEO

https://youtu.be/Hf-R3xR7TR8

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Criminal Defense Lawyer

To speak with a highly experienced Boston criminal lawyer, contact us online or telephone Francis T. O’Brien, Jr. at O’Brien Law Boston twenty four hours, seven days a week, toll free at 617-512-0939. As a member of the Massachusetts and Florida state bars and the federal bar in Massachusetts, Mr. O’Brien has also represented clients on criminal, state and federal matters in more than twenty states.

  • Our Criminal Defense Blog
  • Criminal Cases We Handle
  • Criminal Trial Reports
  • Boston Criminal Lawyer Clerk’s Hearing Reports
  • Boston Criminal Lawyer News
  • Criminal Defense Resources
  • Boston Criminal Lawyer Video

OUR PRACTICE AREAS

  • Assault
  • Burglary
  • DUI
  • OUI
  • Drug Possession
  • Drug Trafficking
  • Clerk’s Hearings
  • Restraining Orders

CONTACT US

617 512-0939
fob@obrienlawboston.com

    OUR OFFICES

    Boston Office
    Suite 602
    10 Tremont St
    Boston, MA 02108



    Hingham Office
    738 Main Street
    Hingham, MA 02043

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    Copyright © 2025 · O'Brien Law Boston, P.C. Attorney Francis T. O’Brien Jr. brings over thirty years of criminal defense experience in the field, and is one of the most well respected Boston criminal lawyers currently practicing today.