I deleted this post because it is not directly related to the Pizzagate investigation. It may loosely be connected, but as such, is a better fit for a more permissive, less investigative subverse such as /v/pizzagatewhatever . It may be worth excerpting or summarizing the content of your link for that subverse too, though.

I found this through a website where a rabbi was answering questions

"Can you explain to me why it is forbidden to inform on another Jew to the government when they have committed something wrong? If I have nothing to gain from the other person being punished, then why is that bad, especially if that is the only way to get these people to stop their behavior?"

Answer: "Thank you for your interesting question. The primary reason this is not allowed is because in previous times, informing on someone would often result in their torture and death, and therefore the informer had the status of a Rodef – who may be killed to prevent him from doing so. For more information, here is an excellent article written by Rabbi Michael Broyde on this topic."