I can imagine this all leading back to Joe, who was connected with Celia at some point. After the illegal organ harvesting, the ordering stabbings, and being responsible for the deaths of three people and just getting away with it, I'd like to think there is some story planned that he gets his. At the time, I did wonder whether his fallout with Celia was real, and I still question whether she has a boss herself, and it's Joe.