Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-70.62.56.205-20130725042949/@comment-13188083-20130725112550

108.218.169.8 wrote: Peter took it from laura by killing her so if you say that is the reason he was a beast, well derek took it from peter by killing him so shouldnt he be a beast too from your reasoning?

I've thought of that too. Maybe Derek can't shift into what Peter could because his intentions are good? But to be honest i think it's just a budget/scenario thing. They just don't want him to.