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Criminal Law

The White Plains and Bronx Law Office of Mark A. Siesel offers aggressive, experienced and skilled representation to individuals and businesses in both state and federal matters. We represent the residents of Westchester County, Rockland County, Orange County, Putnam County, Dutchess County, the lower Hudson Valley, and the entire New York metropolitan area who are currently charged with criminal wrongdoing or under criminal investigation. Our firm will candidly, honestly and effectively assesses the particulars of your case and discuss your legal options. We will contest the evidence presented by the District Attorney’s Office and carefully assess and evaluate the evidence against you to provide the most vigorous defense.

We have been representing clients in the federal and state Court of New York since 1986. If the prosecution’s case has evidentiary issues and our clients wish to take their case before a judge or jury, we will not hesitate to do so, and will promptly retain the necessary experts to solidify our client’s defense. For example, in DWI cases, it is sometimes necessary to retain experts to refute the chemical test results being offered by the district attorney’s office, and /or experts who can contradict the common law findings of intoxication allegedly confirmed by Field Sobriety tests such as the “walk and turn”, one leg stand, and the horizontal gaze nystagmus test in which the client was directed to follow a pointer with their eyes to determine if there were signs of intoxication. However, we are also prepared to obtain the best possible resolution of the case prior to trial where due to the strength of the evidence or financial considerations trial is simply not an option.

The Law Office of Mark A. Siesel provides its clients with representation and counsel in the following areas:

  • Individuals facing potential criminal investigation
  • Individuals facing actual criminal prosecution
  • Bail
  • Arrests
  • Plea Bargains
  • Lie Detector and DNA Testing
  • Misdemeanors, including DWI’s, assault, harassment, possession of forged instruments
  • Felonies (including drug or narcotics possession)
  • Traffic Related offenses including reckless driving and a variety of traffic infractions such as speeding, following too closely, unsafe lane change, failure to obey a traffic control device, texting while driving and other cell phone violations
  • Vehicular Manslaughter and Criminally Negligent Homicide
  • Driver License administrative hearings, including Refusal Hearings in DWI cases conducted at the Department of Motor Vehicles
  • Quasi-Criminal Matters (such as licensing issues with professional and occupational boards or governmental administrative boards for physicians and other medical professionals)

Remember, there are two vital constitutional rights within the United States criminal justice system – first, the presumption that a defendant is innocent until proven guilty, and second, that the prosecution must prove guilt beyond a reasonable doubt. We utilize a collaborative effort with our clients from the moment we are retained through the conclusion of the case by means of judge or jury trial or plea bargain, to analyze every aspect of the prosecution’s case to determine the best possible defense strategy for our clients.

If you are currently under investigation or have been charged with a crime, contact us online or call us at (914) 428-7386 for a free consultation.

Client Reviews

Mark Siesel represented me in a personal injury case. I was extremely impressed with his work for several reasons. He was very professional, committed and thorough in the entire process. Mark's persistence and compassion reassured me that I was never alone. He completed his work promptly and...

L.A., former client

Last year, I was in a very bad car accident with a New York City construction truck. I immediately retained Mark Siesel to represent me, as he had previously represented members of my family in other cases with excellent results. Mark handled all aspects of my case thoroughly and aggressively, from...

J.D., former client

There is no one better than Mark Siesel. He is honest, fair, caring and gets the job done. I felt confident knowing that Mark was representing me. He is a true professional. I would recommend him very highly.

P.A., former client

Previously my opinion of lawyers was rather jaded and not very respectful. My prior dealings with lawyers before retaining Mark Siesel left me feeling frustrated and defensive. When I had a motor vehicle accident and needed a lawyer, I went to Mark. From the initial visit I had with him, through the...

S.G., former client

...thanks for the fine job of Mark Siesel on my settlement... everything was handled expeditiously and with intelligence...I was in good hands with Mr. Siesel.

B.B., former client

When your 19 year old son is in a terrible car accident, one is not thinking of lawyers. We feel very lucky to have Mark be the one that represented us. In a low key way, he guided us through confusing hospital red tape, answered questions and was quickly and consistently available for all our...


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  1. 1 Free Consultation
  2. 2 No Fee Unless You Win
  3. 3 Se Habla Español
Complete the contact form or call us at (914) 428-7386 to schedule your free consultation.

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