Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-173.80.200.218-20130828000927/@comment-6207588-20130828122737

Tyler Hoechlin said in an interview that Derek doesn't trust Peter but that he does need him. lol I see it as a family thing...some relatives are at each others throats all the time but when you come down to it blood is thicker than water.

As for the item Derek went to find...we don't really know if Peter knows about it or not. The finale scene we see of Peter killing Jennifer is essentially a flashback since we see Scott telling Deaton about it. It's possible that Peter may have talked to Derek after he killed Jennifer and also possible that he did not. lol January seems a long time away.