I am directly citing emails revealed in discovery as part of the Department of Justice's antitrust suit against Google. They're all linked in there too! And you can even see who was CC'd. It's a little confusing because some of them are part of one big, fat thread that you have to read from the bottom up.
There are plenty of links in the article to "emails released as part of the Department of Justice’s antitrust case against Google". I didn't read any of it as saying he was involved in those conversations, they're just conversations that have been made public.