In case someone wants to look up the halacha, it’s in Sefer Chofetz Chaim, Hilchot Esurei Lashon Hara, Kelal Vav, Halachos 10-11. The Be’er Mayim Chayim explains why it might be mutar to publicize this story. Basically, it might be mutar so that other Jews can protect themselves from harm. However, to really understand the halacha, you would need to understand how the Chofetz Chaim resolves the question of the Rosh on Rashi in Germara Niddah 61a. (see Be’er Mayim Chayim 28.)