My money still on Maverick has connection with this. He probably the member of Ouroboros because Kriem said that she and Jake only the small fragment of the whole oganization and it's not weird to have more higher rank member on Sternbild government. Though Maverick was not the killer of Bunny's parent but maybe his job that day was taking Bunny out so the real killer can finish his/her job. Maverick then use his position to alter Bunny's memories, probably with the dream/sleeping machine. Hell, he could make Bunny's vision of the killer closer to Jake then he ordered Kriem to make a move to free Jake after all these years and use them both as pawn so Bunny can get his (false) revenge. Maverick also the one who made Bunny reveal his past public, maybe it was to make Bunny more motivated to get his revenge. But in this theory of mine, I can't explain what benefit Maverick/Ouroboros get by doing all of those. Gain Bunny's trust? If yes, for what? 7 episodes to find out
Crazier theory is, Bunny actually a cyborg, the masterpiece of his parent. Ouroboros want to make Bunny join their rank, unconsciously, doing things he thought a hero job ordered by Maverick, an important person of him, but actually it was for Ouroboros