Once it became known that you were covering this shadowy world, sources would sometimes appear in mysterious ways. In one case, I received an anonymous phone call from someone with highly sensitive information who had read other stories I had written. The information from this new source was very detailed and valuable, but the person refused to reveal her identity and simply said she would call back. The source called back several days later with even more information, and after several calls, I was able to convince her to call at a regular time so I would be prepared to talk. For the next few months, she called once every week at the exact same time and always with new information. Because I didn’t know who the source was, I had to be cautious with the information and never used any of it in stories unless I could corroborate it with other sources. But everything the source told me checked out. Then after a few months, she abruptly stopped calling. I never heard from her again, and I never learned her identity.

Well, that's creepy AF.