Gilmore & Delzeith Co., LPA is a law firm headed by attorneys Matthew L. Gilmore and Richard M. Delzeith. Located in Celina, Ohio, our attorneys provide clients with professional and personalized service that is specific to each individual case. Our solid legal services are backed by countless years of experience and strong educational backgrounds. Proudly Serving Mercer County, Auglaize County, Van Wert County, and Darke County. Appointments Available. Let the knowledgeable and skilled attorneys at Gilmore & Delzeith Co., LPA take care of your legal needs. We practice broadly in many areas of law. Our areas of expertise include criminal and civil litigation.