Kiriakou also stated several times that the Mossad was known to casually try to recruit CIA agents:
I think at most we get a indirect "confession" like Andrew Bustamante gave in some podcasts like here, where he answers to the question if the US spies on the Mossad that everybody spies on everybody and than distract to the case were the US was caught spying on (it's ally) Germany: https://www.youtube.com/watch?v=mZklvHVsaT4
PS: I guess at the end you didn't spy until you were caught spying.
And it sounds like you are setting up an untestable claim. Can’t help you there. Believe what you want.