Legal Question in Intellectual Property in Texas

Re: Use of Intellectual Property without permission

Generally, claims for copying works of authorship without permission of the author are copyright infringement cases. However, copyright is federal law and copyright registration is generally a prerequisite to federal court jurisdiction over a copyright claim. If you have not registered a copyright on your materials, that may be your first need here. Once having done that, a notice to the agency to cease and desist from copyright infringement might be appropriate, depending on the degree of similarity. I doubt the damages would be very high in your situation unless you already have a copyright registration, and probably not high enough to justify a court case. The case might be styled you, plaintiff, versus the agency and the individual involved at the agency, defendants.

You should take this to a copyright attorney for evaluation. Copyright cases are fact dependent and there may be principles of government immunity involved and any releases or waivers, particularly contractual ones you have made will need to be evaluated.