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Our Missouri Federal Criminal Defense Lawyers Handle Cases Nationwide

At The Hammer Law Firm, LLC, we offer top-tier criminal defense representation throughout the greater St. Louis area. Additionally, our team handles federal cases across Missouri and nationwide. In the United States, a federal crime is any criminal offense prosecuted under federal law.

Because federal crimes differ from state crimes in many ways - including the investigating agencies, procedures, and more serious penalties and prison terms – it is essential for anyone facing federal charges to work with attorneys who are not only licensed to practice in federal court, but who also have extensive experience dealing with federal prosecutors, federal law enforcement, and the steps needed to help accused individuals secure the most successful outcome possible when the stakes are high.

As a former Assistant Prosecuting Attorney and highly experienced federal criminal defense lawyer who is not afraid to take cases to trial, Attorney Mark Hammer knows how the federal government works when investigating, prosecuting, and penalizing suspects and defendants. His insight and his record of success in difficult cases have earned him a reputation throughout the region as an advocate who knows how to effectively fight federal charges. He is continually retained by clients miles away from St. Louis, throughout Missouri, and across the country for these reasons.

Our firm’s other Partner, Nicole Chiravollati, is also a former Prosecutor who leverages her experience on the other side to advocate for clients charged with federal crimes. In serious federal cases, clients of our firm benefit from the collaboration and teamwork of two highly experienced lawyers.

Our firm is prepared to handle all types of federal crime cases, including:

The U.S. government devotes extensive resources to investigating and prosecuting people suspected of federal offenses, which is why it is critical to your case that you involved a proven federal defense team as soon as possible. As soon as you are aware of being under investigation or as soon as you have been charged, The Hammer Law Firm, LLC is available to help fight to protect your rights at every stage, and to work toward the most favorable resolution available. You can learn more about Attorney Hammer’s experience and the many federal district courts he is licensed to practice in here.

At The Hammer Law Firm, we are passionate about helping our clients avoid the devastating impact of federal conviction. If you or someone you love has been charged or is being investigated, do not wait to call us. We have represented clients in numerous states across the nation, including cases in California, Indiana, Illinois, Minnesota, and Utah. Let us put this experience to work for you.

Contact us today for a free consultation.


Client Testimonials

  • "I could not have imagined getting through this difficult and uncertain time without the help of the Hammer Law Firm."
    - E.M
  • "You don't know how much of a blessing you are to us"
    - C.G
  • "Mark and Nicole are the best law firm partners ever."
    - C.E
  • "Mark and Nicole are the best at getting to the truth of the matter and dedicated to your clients"
    - Vicki H.
  • "Mark Hammer is a decisive, direct, and conscientious attorney. I would definitely recommend him to others."
    - Anonymous
  • "Mark Hammer is a gentleman, exudes confidence and relieves stress with his truth"
    - Anonymous

Why Trust Our Legal Team?

  1. More than 30 years of criminal law experience.
  2. Former prosecutors who know how the
    "other side" operates.
  3. Accessibility and availability – clients can
    always reach our attorneys.
  4. Personalized, one-on-one attention.
  5. Tough negotiators and proven trial lawyers.
Get Immediate Help

Our attorneys are dedicated to working
directly with all our clients.

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