User blog comment:Theory of everything/Grimm Speculations Part Six: The Grimm Family Tree/@comment-96.57.101.234-20120821233731

You know, I was thinking the same thing. Remember the last episode when Kelly told Nick that someone he knows knew he had the key, how would Renard know he has it? I mean, I know he knows Nick is a Grimm, but how would he know that his Aunt Marie had passed the key onto him or for that matter, that she even had the key? He must have known that Kelly didn't possess it. Perhaps this is the reason he attempted to have her killed in Season One? It would make sense. And why was he looking up the accident involving Nick's parents? He knows something...

Another piece of evidence to suggest this theory might actually hold up is when Kelly had told Nick during the Season Two Premiere that the bodies in the accident were so badly deformed that they couldn't even make the victims out using their dental records. Interesting.....