Conversation so far:
What was the drone program under John Brennan?
In April 2012, John Brennan was the first Obama administration official to publicly acknowledge CIA drone strikes in Pakistan, Yemen, Somalia, Libya, Afghanistan, and elsewhere.
What was the result of the drone strikes under John Brennan?
In 2011-2012, John Brennan helped reorganize the drone strike process, and people outside of war zones were put on the list of drone targets. The ACLU disagreed with this.
Did the Drone program continue under John Brennan?
Yes, the drone program continued under John Brennan
Did the Bureau of Investigative Journalism ever find any civilian deaths in John Brennan and the CIA's drone strikes?
The Bureau of Investigative Journalism believed that 45 to 56 civilians, including six children, had been killed by ten US drone strikes under John Brennan.
What were the consequences of John O. Brennan's stance on the drone program?
In October 2015, the contents of John Brennan's personal e-mail account were stolen by a hack and posted on WikiLeaks.
Was anyone fired over the leak of John O. Brennan's personal email?
No, nobody was fired over the leak of John Brennan's personal email
Is there anything else interesting in the article, besides the drone strike program under John Brennan and the leak of his personal emails?
In March 2018, John Brennan said Trump had paranoia, accused him of constant misrepresentation of the facts, and described him as a charlatan.

Question: Was it proven that he lied?
Self-contained rewrite: Was it proven that John Brennan lied?