Chuck’s knowledge and understanding of breath alcohol instruments is exceptional. He worked closely with a manufacturer for many years learning and sharing the knowledge with the defense community. I have gone to Chuck on many occasions to discuss breath alcohol issues and aspects of how the instrumentation deals with the sampling and analysis. I consider him one of the leading experts on breath alcohol within the defense community. As an attorney, Chuck works hard for his clients and doesn’t just deal cases away. He takes the cases personal and fights to get the best resolution possible. In my 30 some years as an expert in breath alcohol testing, Chuck Rathburn is, by far, one of my favorite attorneys for consulting and brainstorming ways to expose the pseudoscience and bad science in the alcohol testing community. I am always impressed by his knowledge and understanding and ability to think outside of the box. I do not hesitate to say Call Chuck!