User blog comment:GArrow101/Arrow has officially been premiered, and wow!/@comment-1962215-20141009015319

I seriously think it was Brother Blood it sounded like his voice filter. Besides he's like the only person I can think of who would have a reason to do this (he hurts Laurel and frames Oliver) also this doesn't seem like something Malcolm would do(I also don't see how it benefits him) and Slade is locked up. So the only person with motive as well as the only person that would shock Sara would be someone that she wouldn't expect like Brother Blood.