User blog comment:Zolnir/RTX 2014: RWBY Panel Questions/@comment-173.248.23.37-20140706144519/@comment-3146930-20140706145908

No, it would have to be someone we don't see coming. Someone fast that can sneak up on Ozpin without him knowing and take him out before retreating just as quickly. Someone that would have a motivation for helping the bad guys. Someone like...Bartholomew Oobleck.

Think about it, he is a very fast teacher that makes no noise because he just glides across the floor. He teaches history and may feel that Ozpin is repeating some past mistakes. He also clearly feels for the Faunus and may be aiding them in some way. It is the perfect cover.