Reading the all her posts together, rather than just her one post in isolation, I concluded that her comment meant 'I know the person you're saying is the 3rd person' - not so much that she KNEW that he was the 3rd person. I think she was speculating that he MAY have been involved, and confirming that she knew him & felt he was capable of some pretty bad stuff - but not that she had any knowledge that he was involved. Just MOO
At first she did not say much but I just read the entire thread and she does eventually say more. Read the whole thread. She does say she called it in though.