Does anyone have forms or a manual or other materials for setting up tracking. It seems to me that, since snitches may travel from one county to another, it would make sense to have DPS, TDC, or some other state agency collect, index, and share this information.

Forget DPS doing it. Databases cost money.

Tarrant County's Criminal DA was an early adopter of a system some have held up as a model. This information is a little dated but will give you an idea:

https://drive.google.com/file/...TTGlG6dOwtyIwma/view

Contact their office if you want to learn more.