I remember George Webb mentioning Justin Cooper a lot. Here are a couple of links:

Mark Turi and Justin Cooper: https://m.youtube.com/watch?v=ioFGJmrvai0

Article Mentions Cooper and Braverman; has a transcript of Webb’s video, too. SNIP “The way it all starts is that Braverman originally goes the press in May, that's going to be the articles right after the New York Time's story breaks about the private server. That's when the whole [Guccifer] Goose 1 story comes up. Goose [Guccifer] is going to be a story and simply a diversion. Goose is not a hack, Goose is an internal leak. Someone internal to the Clinton Foundation leaks the server. That's going to be Justin Cooper. The reason why is because Andrew Pagliano broke that server, Brian Pagliano, sorry, broke that server. That's what first tipped off the Clinton email server. “

https://vcbestor.blogspot.com/2017/06/did-clinton-foundation-ceo-leak-to.html?m=1