Do you need a private investigators license to practice forensics in Texas? Well in many cases yes.  If, for example, you are directly securing evidence and analyzing said evidence, then yes you do.  However there are exceptions. Frequently I am asked to render an expert opinion in court cases regarding forensic procedures.  According to the Texas Department of Public Safety a scientific review and even serving as an expert witness does not require a private investigator license “Section 1702.130 of [...]