The following link leads you to the Texas Constitution and Texas Statutes. Use this link to access Texas law contained in the Penal Code, the Controlled Substance Act (Chapter 481 of the Health and Safety Code) and the Code of Criminal Procedure.
Cornell University Law School has a great website on Federal law. Use the following link to access the United States Code. Title 18 contains Federal law pertaining to crimes and criminal procedure.
If you have difficulty finding the law you are looking for, please give me a call and I will walk you through these great resources.