I have an upcoming trial in which the Defendant possessed multiple counterfeit $100's. I know the Secret Service is usually the best resource for testimony regarding money but I am covering my bases in case I can't find a SS Agent to testify in my trial.

Can anyone point me in the direction of a law enforcement officer or expert witness in the Dallas/Fort Worth area who would be able to testify about the counterfeit in my case? The trial will take place in Johnson County, Texas.