The Firm

Casselman & Henderson, P.C. is an Upper Peninsula law firm located in Marquette, Michigan. Two attorneys are associated with the firm: Thomas P. Casselman and Sarah E. Henderson. Rhonda Casselman is our in-house licensed private investigator.


Casselman & Henderson, P.C. specializes in both criminal defense and family law.


While our physical office is located in Marquette, Michigan, our attorneys and staff travel to serve the entire Upper Peninsula. We have represented clients in every county in the U.P.

The Firm at Work

The hallmark of our firm is the quality of our representation. We get to know our clients well and work hard to ensure their needs are met. Phone calls are returned promptly, and we make an effort to ensure that clients are kept informed of the status of their cases. The relatively small caseload we carry allows our attorneys and staff to devote the necessary time to ensure that every viable option is explored in the preparation of each client’s case. Our attention to detail means that, whether you choose to settle your case or proceed to trial, you’ll know that no stone was unturned in the preparation and presentation of your case.