(SPOILER)It's still important who was doing it. Psychological warfaring someone isnt something you generally trust to a goon. Just having the information isnt going to cut it, you need to know what to say to nudge them to do whatever.

Anyway my current theory is that Garret is a SHIELD agent pretending to be a HYDRA pretending to be SHIELD under orders from Nick Fury and Victoria Hand was HYDRA trying to perform damage control incase the incursion didnt succeed. Another head that might grow incase thier main one is cut off.