Charged with Manslaughter in Massachusetts? Our Aggressive Defense Attorneys Are Here to Protect Your Future
If you’ve been charged with Manslaughter in Massachusetts, your future, freedom, and reputation are on the line. At the Law Office of Matthew W. Peterson, we understand the high stakes involved in these cases. With offices located in both Boston and Salem, our law firm represents individuals across Suffolk, Essex, Middlesex, and Norfolk Counties. Whether you’re from Boston, Brighton, Chelsea, Salem, Lynn, Peabody, or the surrounding areas, our experienced and aggressive defense attorneys are ready to stand by your side.
Our criminal defense law firm is composed of skilled attorneys and a former prosecutor who brings valuable insight into how the state builds its cases. We use that knowledge to find weaknesses in the evidence, protect your rights, and aggressively represent you in court. If you’re facing Manslaughter charges, it’s critical to act early and begin building your defense strategy with a team that takes your case personally.

Understanding Manslaughter Charges in Massachusetts
Manslaughter is a serious offense in Massachusetts and is classified under Chapter 265, Section 13 of the Massachusetts General Laws. It is divided into two categories:
- Voluntary Manslaughter: This occurs when someone kills another person in the heat of passion due to reasonable provocation or sudden combat. The law distinguishes this from murder due to the absence of malice.
- Involuntary Manslaughter: This applies when a death is caused unintentionally during reckless or wanton conduct—such as in a fight, accident, or during an unlawful act that doesn’t rise to a felony.
Both forms are felony offenses with significant prison time if convicted. Voluntary manslaughter carries up to 20 years in state prison, while involuntary manslaughter can result in up to 20 years, though sentencing may vary depending on the circumstances.
Why You Need an Experienced Boston Criminal Defense Attorney
A Manslaughter charge can arise from complex situations, often involving self-defense, mutual altercations, or accidental outcomes. The Law Office of Matthew W. Peterson focuses on assault and violent crime, and we work closely with clients to develop a tailored, strategic response based on the facts of each case.
As a trusted criminal defense law firm in Massachusetts, we know how local courts, judges, and prosecutors operate. Our approach involves:
- Investigating all aspects of the incident, including witnesses, physical evidence, and law enforcement procedures.
- Challenging the prosecution’s narrative, especially where intent or recklessness is in question.
- Exploring all legal defenses, such as self-defense, lack of intent, or accident.
- Filing motions to suppress inadmissible evidence or challenge the legality of the arrest.
We’re known for aggressive courtroom representation, but we also understand when it’s in your best interest to negotiate or seek pretrial options that could minimize exposure.
Who We Represent
Our criminal defense law firm represents individuals charged with manslaughter across a wide range of communities in Massachusetts. We work with clients from Boston, Brighton, and Chelsea in Suffolk County, as well as Salem, Lynn, Swampscott, Peabody, and Saugus in Essex County. We also assist clients in Cambridge, Somerville, and Newton in Middlesex County, and in Brookline in Norfolk County.
Regardless of where you live or where the incident took place, we understand the local court systems and tailor our approach based on the specific jurisdiction and circumstances. Every case is unique, and our attorneys focus on providing a defense that fits the facts and legal complexities of your situation. If you’re facing serious allegations involving a loss of life, it’s essential to have a Massachusetts defense attorney who knows the courts, the law, and how to challenge the case against you effectively.
What to Do if You’ve Been Charged with Manslaughter
If you’re being investigated or have been charged with manslaughter, your first steps are critical. Avoid speaking with police or investigators before consulting with a criminal defense attorney. Even seemingly harmless conversations can be used against you later.
Start by gathering any evidence that may support your side of the story—this might include messages, videos, or photos from the time of the incident. Write down everything you remember while the details are still clear. If there were any witnesses, note their names and contact information if possible.
Then, reach out to an experienced Boston defense attorney who can evaluate your case and guide you through the legal process. Taking these steps early can protect your rights and help build a stronger defense from the beginning.
Contact Us Now to Set Up a Strategy Session
A manslaughter charge is not something to face alone. Whether you’re facing allegations in Boston, Salem, or anywhere in between, the Law Office of Matthew W. Peterson is ready to take immediate action. Our team has successfully defended clients in difficult cases and is committed to guiding you through this process with clarity and determination.
Your side of the story matters—and we’re here to make sure it’s heard.
Contact our office today to schedule a confidential strategy session. We’re here to review your case, discuss your options, and take steps to protect your rights. With experience on both sides of the courtroom, we bring a balanced, informed, and aggressive approach to every case.
Frequently Asked Questions
What is the difference between murder and manslaughter in Massachusetts?
Murder requires malice or premeditation, while manslaughter typically involves a killing without prior intent, such as in the heat of passion or through reckless actions.
Can I be charged with manslaughter for a car accident?
Yes. If the accident resulted in death due to reckless behavior, you could be charged with involuntary manslaughter.
Is manslaughter always charged as a felony in Massachusetts?
Yes. Both voluntary and involuntary manslaughter are felony-level offenses with potential prison time.
What are possible defenses against a manslaughter charge?
Common defenses include self-defense, accident, lack of intent, or insufficient evidence.
Will I go to jail if convicted of manslaughter in Massachusetts?
A conviction often leads to state prison time, but the sentence can vary depending on circumstances. Mitigating factors and strong legal representation can make a difference.