Ping @josh as he is the best one to answer...
(And my apologies, I probably should have ping earlier, and, just to be clear, I was not implying that he may be lying, nor that Let's Encrypt staff did something "wrong"!)
I just felt it was important that the community gets all the fact about that event, in particular regarding Let's Encrypt and U.S. laws and Is Let's Encrypt going from savior to single point of failure (SPOF)? , and If Let's Encrypt did it of they own initiative or because they were contacted by the US government.