Marcel Lehel Lazar, also known as Guccifer, has admitted the hack of the Hillary Clinton ‘s private email server occurred in 2013. Lazar is currently sitting in a Virginia jail, being held for the hacking of email accounts of senior political members and Clinton friend, Sidney Blumenthal. It was Clintons connection with Blumenthal that enabled Lazar to access the Clinton server. While he says he only accessed the server twice, he claims to have obtained 2-gigabytes of information. He has thus far refused to provide any of the emails to which he gained access.”]
Source: http://securityaffairs.co/wordpress/47041/cyber-crime/guccifer-admits-hillary-clinton-hack.html