In recent months, there has been talk of “bad blood” in the small world of CIA contractors who are vital to the agency’s hacking projects, people familiar with the investigation have said.

Digital trail has pointed investigators to a team of developers working with CIA’s Engineering Development Group

https://www.wsj.com/articles/authorities-questioning-cia-contractors-in-connection-with-wikileaks-dump-1489283964?tesla=y&mod=e2fb