Board Thread:Episode Discussion/@comment-14138255-20161211174540/@comment-28522425-20161224040643

Yeah, I'm not so sure.

The scene seemed to be setting up an eventual confrontation between Ren and the Grimm that killed his parents, but, even if he knew what kind of Grimm it was, Ren would be most likely incapable of recognizing it if he didn't saw it in person, in which case he could have seen distinctive marks in the Grimm, such as a scar that someone made it or something.