About Us



Matthew Haicken

Personal Injury Attorney

I have been practicing personal injury and insurance law since my graduation from law school in 2007. In addition to years as a practicing lawyer, I also spent three years working at a large insurance company where I worked with excellent lawyers from around the country. This experience has proven invaluable. I gained insight into how insurance companies evaluate claims, and I learned the tactics they employ to fight personal injury lawsuits.

I enjoy helping people through difficult situations and making a positive impact on the lives of my clients.

When not practicing law, I am actively involved in NYSTLA, the New York State Trial Lawyers Association. We are a group that lobbies on behalf of injury victims. I believe the courthouse doors should be open to everyone, regardless of his or her immigration status, or financial situation. I am committed to fighting for a strong civil justice system that enables people who have been harmed to hold wrongdoers accountable.

Brooklyn Law 2007
Brown University 2002



Harleigh Tensen

Criminal Defense Attorney

Harleigh Tensen is a criminal defense and civil rights attorney. She received her J.D. from New York Law School in 2012, and her B.A. from Franklin & Marshall College, where she double-majored in Government and Religious Studies. After graduating from law school, Harleigh joined Siegel Teitelbaum & Evans LLP, where she gained extensive litigation experience in a wide range of civil rights cases before joining the Brill Legal Group in 2014.

Harleigh understands that clients enter the criminal justice system with a myriad of social, economic, and legal issues. She is deeply committed to addressing both our clients’ immediate legal issues, as well as the broader policy and institutional barriers that confront criminal defendants.

PETER E. BRILL – Of Counsel


Peter E. Brill

Criminal Defense Attorney

Peter E. Brill has extensive trial experience in state and federal court, arbitration and administrative proceedings. He has established a solid reputation with state and federal prosecutors throughout New York and practiced before nearly every administrative agency there is. He has won far more cases than he has lost for his clients in practically every county in the New York metropolitan area.  He is in the Long Island and New York City area courts every single day and meets nearly every client, either in court or in the office. He has represented and defended thousands of people charged with misdemeanors and felonies in New York.

A former Assistant District Attorney, he now focuses on criminal defense and representing health care and other professionals who are being investigated or fighting disciplinary charges. He graduated cum laude from Brown University and received his law degree from Georgetown University Law Center. He was formerly an Adjunct Professor at the New York Institute of Technology.


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