The "Arizona Audit" clowns claim they are using RStudio for computer forensics. RStudio is NOT a computer forensics tool that is used to do a deep forensics evaluation.
In fact, RStudio would never be recommended for forensics use in any type of law enforcement or investigation situation. Using RStudio -- which is not designed for supporting chain of custody, image creation with proper attribution, or most other functionality of proper computer forensics tools -- would undermine the entire investigation.