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The Law Office Of William J. O'Neil is Always Here For You

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An Experienced and Zealous Attorney In Massachusetts

William O'Neil has been providing high quality legal representation in criminal cases in Western Massachusetts for over 35 years. With an office conveniently located in East Longmeadow, he has a wide range of experience in handling cases from OUI and drug cases to murder trials and complex multi-defendant cases.

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Massachusetts Criminal Defense & OUI Cases

If you or someone you know has been arrested, you may want to know some basic information about Criminal Law in Massachusetts. Attorney William O'Neil provides answers to many of these common legal questions at his office. If you have a question about a case you or a loved one may be involved in, contact Attorney O'Neil to get questions answered about the specifics of that matter. Every case is different. The best "answer" and as well as the most approach depends on the facts and circumstances surrounding that specific matter.


Experience in all types of criminal matters including:

  • Motor vehicle homicide
  • Driving under the influence of drugs or alcohol
  • Domestic violence
  • Drug distribution and trafficking
  • Murder and manslaughter
  • Sexual assaults of adults
  • Sexual abuse of children
  • Fraud and embezzlement
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William J. O'Neil

Attorney At Law

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