
William Manchinton Jr
Monahan at Associate, P.C
I’m William J. Manchinton, Jr., a criminal defense attorney based in Massachusetts. I’ve been practicing law with the Law Office of Matthew W. Peterson since September 2024, where I focus on representing individuals facing criminal charges. My journey into this field wasn’t a straight line—I started in insurance defense, working on subrogation cases. But I quickly realized that my true passion lies in criminal law, where I can engage more directly with people and make a meaningful impact in their lives.
I graduated from George Washington University in 2015 with a double major in Philosophy and History, two subjects that sharpened my critical thinking and deepened my understanding of human nature and society. From there, I went on to earn my law degree from American University Washington College of Law in 2020.
While in law school, I worked with the Civil Advocacy Clinic, representing low-income clients in disability and employment matters. That experience reinforced my commitment to justice and advocacy—it gave me hands-on insight into how the law can be a powerful tool for people who might not otherwise have a voice.
Now, in my criminal defense practice in Boston, I fight for clients from all walks of life. Everyone deserves a fair defense, and I strive to be the person standing in their corner when they need it most.
- American University Washington College of Law
- J.D.
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- The George Washington University
- B.A. | Double Major in History and Philosophy
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- Associate attorney
- Monahan at Associate, P.C
- Current
- Litigated a variety of insurance defense cases, specializing in commercial property and subrogation.
- Student Attorney
- The Civil Advocacy Clinic
- Current
- Advocated for indigent clients with disabilities facing employment discrimination and exploitation.
- Law Clerk
- Brault Graham, LLC
- Current
- Assisted senior attorneys in a variety of civil practice areas, including medical malpractice, insurance defense, and wills & trusts.
- State Bar of Massachusetts  # 709430
- Member
- - Current
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- Massachusetts
- Massachusetts Board of Bar Overseers
- ID Number: 709430
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- Criminal Law
- Criminal Appeals, Drug Crimes, Expungement, Fraud, Gun Crimes, Internet Crimes, Sex Crimes, Theft, Violent Crimes
- Domestic Violence
- Domestic Violence Criminal Defense, Domestic Violence Restraining Orders, Victims Rights
- DUI & DWI
- Immigration Law
- Asylum, Citizenship, Deportation Defense, Family Visas, Green Cards, Immigration Appeals, Investment Visas, Marriage & Fiancé(e) Visas, Student Visas, Visitor Visas, Work Visas
- Divorce
- Collaborative Law, Contested Divorce, Military Divorce, Property Division, Same Sex Divorce, Spousal Support & Alimony, Uncontested Divorce
- English: Spoken, Written