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An Experienced Defense Attorney and Former Prosecutor

Mark A. Hammer is an accomplished criminal law attorney who can provide the experienced representation you need if you have been charged with a state or federal crime in the state of Missouri.

As a former prosecutor and a seasoned trial lawyer, Mr. Hammer has personally handled more than a hundred criminal trials and is known for his attention to detail, meticulous trial preparation and passionate advocacy.

Mark A. Hammer has been a licensed attorney for more than 25 years and is licensed to practice in Missouri, Illinois, Minnesota, California, Washington and the U.S. Court of Appeals for the 8th Circuit. Attorney Hammer has served as faculty member at the National Advocacy Center in South Carolina, and adjunct professor of Criminal Trial Advocacy at Saint Louis University School of Law and the William Mitchell School of Law in Minnesota.

Mr. Hammer is a member of the National Association of Criminal Defense Attorneys, the Missouri Association of Criminal Defense Attorneys and the Bar Association of Metropolitan St. Louis.

To learn more about attorney Hammer, please visit his attorney profile by following the link below.

To learn how our Missouri criminal defense lawyer can help you fight charges in state or federal court, contact The Hammer Law Firm in Clayton, Missouri. We serve clients in the St. Louis metro area and throughout the state of Missouri.

The choice of a lawyer is an important decision and should not be based solely upon advertisements. This disclosure is required by rule of the Supreme Court of Missouri.

Criminal Defense Overview

The Hammer Law Firm

The Hammer Law Firm, LLC
7710 Carondelet Suite 200
St. Louis Area, MO 63105
Phone: 314-266-7821
Toll Free: 888-848-3565
Fax: 314-725-8443
Map and Directions

  • Could acid reflux skew DWI tests?

    On behalf of The Hammer Law Firm, LLC posted in DWI/DUI on February 06, 2012.

    When law enforcement and court officials are investigating and prosecuting drunk driving offenses, they often rely heavily on breath and blood tests as evidence of the defendant's alleged wrongdoing. But as with all technology, these tests can make mistakes, and...

  • Argument leads to assault, car theft in St. Louis

    On behalf of The Hammer Law Firm, LLC posted in Assault on February 03, 2012.

    Often, when we hear about a crime on the news or read about one in the paper, it is a major incident involving one or more people in dire situations. What we don't often realize is that criminal offenses can...

  • 'Barefoot Bandit' sentenced for theft crimes

    On behalf of The Hammer Law Firm, LLC posted in Criminal Defense on February 01, 2012.

    The 20-year-old man known as the "Barefoot Bandit" has been sentenced to more than six years in a federal prison, which will be served concurrently with the seven-year sentence he received from a state court judge last month. According to...

  • Missouri police need warrant before testing blood of DWI suspect

    On behalf of The Hammer Law Firm, LLC posted in DWI/DUI on January 28, 2012.

    Last week, the Missouri Supreme Court handed down a ruling that will make it more difficult for police officers to gather blood-alcohol data on drunk driving suspects. Under the high court's verdict, Missouri police officers will be required to obtain...

  • Supreme Court bars GPS tracking without a warrant

    On behalf of The Hammer Law Firm, LLC posted in Criminal Defense on January 24, 2012.

    In a landmark ruling, the Supreme Court of the United States has ruled that police officers must get a search warrant before using a GPS device to track criminal suspects. Analysts believe that the ruling may be the first of...

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