Just a word of caution though I know I'll be derided for it. If you choose to act as a LEO things could go terribly wrong for you if you screw up. You're wide open to criminal and civil charges. LEOs have an employer to cover civil damages plus limited criminal immunity. A a private citizen you don't.

The key elements in human thinking are not numbers but labels of fuzzy sets. -- L. Zadeh

Which explains a lot.