J. ALLEN MASTANTUNO
Charleston, SC Criminal Defense and Trial Attorney

Allen Mastantuno was born and raised in Charleston, SC. He graduated from the College of Charleston (B.A., 2003) and from the University of South Carolina School of Law (J.D., 2007).

J. Allen Mastantuno headshot

After graduating from law school, he clerked for the Federal Public Defender’s Office in Charleston, SC gaining valuable experience in the Federal criminal system. From 2008 to 2010, Allen worked as a prosecutor for South Carolina’s Ninth Judicial Circuit which includes Charleston & Berkeley County.

He became the lead DUI prosecutor in the Berkeley County office and handled over 100 DUI cases ranging from DUI 1st Offense to Felony DUI Involving Death. As a prosecutor, he was extremely active in the courtroom, trying difficult and lengthy cases including such serious offenses as Armed Robbery and Burglary. While earning his reputation as a hard fighting trial attorney, he also assisted with and prosecuted hundreds of other cases ranging from Murder to traffic violations.

Since 2010, Allen Mastantuno has focused his entire practice on defending his client’s rights. He has successfully represented clients who face serious criminal charges or who have been injured in an accident. Examples of charges Allen Mastantuno has defended include: Murder, Attempted Murder, Armed Robbery, Arson, Criminal Sexual Conduct, Burglary, Felony DUI, Trafficking of Drugs, Manufacturing/Distribution of Drugs, Financial Crimes. If you have been charged with a crime Mastantuno Law Firm, LLC can help.

As a trial attorney, Allen Mastantuno has also helped people who have been seriously hurt. Whether you have been hurt in a car, motorcycle, boat or other vehicular accident Allen Mastantuno can help.

What Customers Are Saying

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Tyler Cotterill
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Great lawyer! Helped me when I really needed it.
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William Drew profile picture
William Drew
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This is your man! Thank you Mr.Mastantuno your professionalism and patience helped me in a time of confusion.
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Carol Bruton
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It was a great experience. Everyone was very professional and kind. Attorney Mastantuno 'just handled the business'. He did a fantastic job!
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Daunte Hall
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Great attorney that will go to bat every time for his client I would give more stars if I could thanks Allen from Mr.Leslie.
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Caroline M Pettigrew
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Allen was very professional, informative, and kind throughout my DUI case. He was attentive and regularly responsive to my emails and phone calls! Allen took a very bad, bad situation and got a very good, good result! I can’t thank him enough!
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Geisy Adriany De Almeida Barbosa
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Super indico
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Chalo Hernandez
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This place got me the information I needed quick and easy.
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DeeCeeCover s
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This is a very knowledgeable lawyer who is easy to work with and gets back to you in a timely manner.
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Sam F
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Allen represented me in an accident case in which he did a fantastic job. First of all he gave me more money off of the total than he was required to. In the beginning of a criminal defense case, that he is also handling for me, he worked with me on the fees and was way more than patient. Can’t say enough good things about him as a professional and a person with integrity. Y’all, hire him! Highly recommended!