Attorney Hahn has devoted his career to working with and advocating for children and families.

When your child is denied an education or when your civil rights are violated, he is the intelligent, experienced, highly effective lawyer you need. When you get a call from the police or when DCF comes knocking at your door, he is committed to protecting your rights.

Attorney Hahn is sensitive and compassionate, clear and direct, efficient and strategic. He knows the law, knows who you are up against, and knows his way around the courtroom.

Attorney Hahn represents clients at all stages of the legal process, from consultation to trial to appeal. He will fight for what is right for you.

Attorney Hahn is licensed in Massachusetts. He is also admitted to the United States District Court in Massachusetts.

Attorney Hahn is the founder of OneLaw.

Juris Doctor:  Boston University School of Law (cum laude)

Bachelor of Arts:  Harvard College (cum laude)

Council of Parent Attorneys and Advocates

Massachusetts Bar Association [former Juvenile & Child Welfare Section Council Chair]

Massachusetts Juvenile Bar Association

Massachusetts LGBTQ Bar Association [former Board Member]

SPaN – Special Needs Advocacy Network

Demystifying Student Discipline (Youth at Risk conference, 2019)

Special Education Law: Rights & Responsibilities (AANE, 2019)

ASD & Criminal Law (AANE & DDS, 2019)

“Second Tuesday” office seminar series (2018)

Student Discipline Law (Cambridge SE-PAC, 2018)

Updates on Essential Special Education Cases and Trends (Youth At Risk Conference, 2018)

Where the Classroom Meets the Courtroom: Deconstructing the Cradle to Prison Pipeline (Massachusetts Bar Association, 2018)

Strategies and Considerations for Representing Juveniles in Court (Lorman, 2017)

The Complex World of Student Discipline: School Exclusion, Special Education & Juvenile Court (Special Needs Advocacy Network, 2017)

Fundamentals of Special Education: Juvenile Court Issues & Strategies (Suffolk Law School Advanced Legal Studies, 2014)

Overview of Child Requiring Assistance Law (Parent/Professional Advocacy League, 2013)

School Discipline Protections for Students with Mental Health Needs (Federation for Children with Special Needs, 2013)

Developing Behavior Plans for Aggressive Children (Lorman, 2012)

Special Education Laws Made Simple (National Business Institute, 2012)

Litigating at the Bureau of Special Education Appeals (Margolis & Bloom, 2012)

School Discipline Protections for Students with Mental Health Needs (Federation for Children with Special Needs, 2012)

Student Misbehavior: Legal Rights and Responsibilities (Lorman, 2011)

Special Education Law: Rights and Responsibilities (Massachusetts Bar Association, 2011)

Legal Ramifications of Bullying (AANE – Asperger’s Association of New England, 2011)

Special Education Law: Fundamentals (National Academy of Elder Law Attorneys, 2011)

Transition Planning in Special Education Law (NESCA, 2011)

Special Education Law: An Overview (Mental Health Legal Advisors Committee, 2011)

Bullying and Social Aggression (Lorman, 2011)

Due Process Complaints and the Bureau of Special Education Appeals (Margolis & Bloom, 2011)

Consequences of Misbehavior: Criminal Law, Juvenile Court, Student Discipline (AANE – Asperger’s Association of New England, 2010)

Education of Disabled Children (Boston College School of Social Work, 2010)

Ain’t Misbehavin’: Student Discipline and Juvenile Court (Legal Assistance Corporation of Massachusetts, 2010)

Ain’t Misbehavin’: How School and the Juvenile Court Respond to AS Children (AANE – Asperger’s Association of New England, 2008)

AS & Criminal Law (AANE – Asperger’s Association of New England, 2008)

Schools and the Juvenile Court: Fundamentals (MCLE, 2008)

Ain’t Misbehavin’: Dealing with Schools and the Juvenile Court (Wayside/Tempo, 2008)

Juvenile Court 101: Basics of the Juvenile Justice System and How to Best Protect Children with Special Needs in the System (Federation for Children with Special Needs, 2007)

Business and Pleasure: Achieving Your Work-Life Balance (Massachusetts Bar Association, 2007)

Judicial Law Clerk, Massachusetts Juvenile Court

Science Teacher



Attorney Vietzke is ‘of counsel’ to OneLaw.  She graduated from Boston University and Massachusetts School of Law, magna cum laude. She was a full-time professor at the Massachusetts School of Law for 17 years.  Holly spent five years serving on the board of her town’s SEPAC (an advisory council of parents of children with special needs) and has a deep understanding of the challenges both parents and schools face in special education.  As the parent of a child with disabilities, Holly is passionate about ensuring that every child receives a meaningful education.

When not watching or coaching her children play sports, Holly enjoys spending some of her time giving back to the community. One of Holly’s favorite volunteer roles is facilitating programs of Understanding Our Differences in the North Andover elementary schools, which teaches children about what it is like to have different abilities and challenges. Holly is also a volunteer softball commissioner and coach, as her other passion is fostering and improving athletic opportunities for girls.

Attorney Vietzke is licensed in Massachusetts and New Hampshire.

Juris Doctor:  Massachusetts School of Law (magna cum laude)

Undergraduate:  Boston University

Publications Co-Chair, MassNAELA, 2022-present

Board of Directors, Fidelity House CRC, 2017-2021

Board of Directors, Dyspraxia Foundation, 2012-2015

Board of Directors, Merrimack Valley Estate Planning Council, 2019-2021

Volunteer, Massachusetts Advocates for Children, 2017-2018

Member, Council of Parent Attorneys and Advocates

Member, Special Needs Advocacy Network

Member, National Academy of Elder Law Attorneys (NAELA)

Member, Special Needs Steering Committee, Massachusetts Chapter of NAELA

Board Member, North Andover Athletic Association 2022-present

North Andover School Committee, 2017-present

Board of Directors, Rolling Ridge Conference & Retreat Center, 2016-2021

North Andover Parent Resource Network

North Andover Parent Advisory Council

Commissioner and Coach, North Andover Booster Club Softball


Chiara LaPlume joined the firm in 2023 ‘of counsel’ to represent OneLaw’s residential real estate clients.  She obtained her Bachelor in Laws from University College, University of London, England and earned her LL.M. from Boston University School of Law.  She is a dual Italian citizen who grew up in Italy, England, and Germany.

Attorney LaPlume assists clients with diverse real estate needs, ranging from first time home purchasers to seasoned sellers and condominium associations.  She enjoys educating her clients about the process and the options that they have.

She is a longtime member of the Real Estate Bar Association for Massachusetts and has been a presenter and panelist for various professional associations.

Attorney LaPlume is admitted to practice in Massachusetts.

Bachelor in Laws:  University College, University of London, England

LL.M.:  Boston University School of Law

Real Estate Bar Association for Massachusetts (REBA)


Chris Connolly joined OneLaw in 2023 to represent clients in the areas of criminal and delinquency defense, education law, and civil rights.  He understands the needs and concerns of the clients he represents, and has dedicated his legal career to assisting people with disabilities as well as working people.

Attorney Connolly graduated from the University of Massachusetts – Boston (summa cum laude) and from the University of the District of Columbia David A. Clarke School of Law (cum laude).

In the District of Columbia, Attorney Connolly developed through private practice and government experience litigating cases in the areas of special education advocacy, labor and employment law, and social security disability.  Attorney Connolly had frequent success in the District of Columbia winning at due process hearings additional support and services for school children, including private school placement.

After returning to his hometown, Attorney Connolly became a member of the Dorchester Bar Association where he continues to advocate on behalf of clients facing a wide variety of criminal charges.  He is also a member of the Massachusetts Bar Association and the Massachusetts Association of Criminal Defense Lawyers.  He is a 2023 graduate of the National Criminal Defense College’s Deryl Dantzler Trial Practice Institute.

Attorney Connolly is a cycling enthusiast and avid reader.

Attorney Connolly is licensed to practice in Massachusetts.  He is also admitted to the United States District Court of Massachusetts.

Juris Doctor:  University of the District of Columbia, David A. Clarke School of Law (cum laude)

Bachelor of Arts:  University of Massachusetts – Boston (summa cum laude)

National Association of Criminal Defense Lawyers (NACDL)

Massachusetts Bar Association


Beth S. Herr joined OneLaw in 2024 ‘of counsel’ representing clients in various areas of family law.

Attorney Herr is a seasoned lawyer with four decades of legal practice in Massachusetts.  Her years of experience as an attorney combined with her Master’s in counseling psychology and her work with families prior to becoming an attorney makes her uniquely qualified understand and to successfully represent her clients’ interests.  During her early years of practice, Beth was a general practitioner giving her a wealth of knowledge in various areas of the law.  Now her focus is on family law and representing clients and their families in diverse areas to meet their needs.  Beth is committed to fighting for gender and racial equality, advocating for the rights of victims of domestic violence and sexual assault, and safeguarding the rights of the LGBTQ community.

As a visiting professor at The College of the Holy Cross, Attorney Herr shares her knowledge and experience with the next generation of lawyers each semester.  She teaches Internship Seminars, which include topics in Social Justice, Law and Popular Culture, and various other legal issues.

Attorney Herr is a co-founder of Daybreak, Inc., a shelter for battered women and their children in Worcester, Massachusetts, and a co-founder of the Massachusetts Coalition of Battered Women Service Group.  She worked on the first abuse prevention laws in Massachusetts.

In her free time Beth enjoys spending time with her family, her dog Max, and friends.  She also loves walking and being outside.

Attorney Herr is a graduate of Northeastern University Law School.  She obtained a Master’s degree in counseling psychology from Anna Maria College and a B.A. from Clark University.

Attorney Herr is licensed to practice in Massachusetts.  She is also admitted to the United States District Court of Massachusetts.

Guardianship Adoption
Child Welfare/DCF Probate and Family Court

Juris Doctor:  Northeastern University Law School

Undergraduate:  Clark University

Graduate:  Anna Maria College, Master’s in counseling psychology

Visiting Professor at The College of the Holy Cross


Stacey is OneLaw’s office assistant handling administrative and financial matters for the firm. She likes to take long walks and hikes with her two sons, husband, and dog Indy. Many years ago her grandmother worked in the same building where OneLaw is located today.