A Missouri Criminal Defense Firm
The Hammer Law Firm is a full-service criminal defense practice that represents adults and juveniles throughout the state of Missouri. We handle all criminal charges from misdemeanor DWI to murder and other serious felonies.
Our defense practice has an emphasis on complex crimes, including federal charges, serious gun or drug charges, murder, fraud, white collar crimes and sex crimes. We also have extensive experience in more common offenses such as, DUI/DWI, drug possession, domestic violence and theft offenses.
Sound Legal Representation From a Former Prosecutor
Our founding attorney, Mark A. Hammer, is a former prosecutor with over a decade of criminal law experience and more than a hundred criminal trials to his credit. As a former prosecutor, he has seen the criminal justice system from both sides and he understands the strategies that police and prosecutors use to build their cases.
Striving to Provide Innovative and Aggressive Defense Strategies
People who retain our firm for their legal matter can be confident that they are represented by a qualified and skilled defense attorney who will work diligently to pursue the best possible result in their case.
At our firm, we seek creative solutions to legal challenges. We work hard to provide our clients with innovative and aggressive defense strategies. As a result of attorney Hammer's vast prosecutorial experience, he knows the system and is not intimidated by complex criminal cases. We know what evidence prosecutors need to prove their case and understand how to chip away at that evidence, strategically and systematically.
Contact Us
We are privileged to serve clients in the St. Louis metro area and throughout the state of Missouri. To schedule a free consultation with attorney Mark A. Hammer, call 314-266-7821, or contact us by e-mail.
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.


