Guccifer Says 'It Was Easy' to Hack Into Hillary's Email Server

Guccifer's potential role in the Clinton email investigation was first reported by Fox News last month. The hacker subsequently claimed he was able to access the server -- and provided extensive details about how he did it and what he found -- over the course of a half-hour jailhouse interview and a series of recorded phone calls with Fox News. Fox News could not independently confirm Lazar's claims.

The former secretary of state's server held nearly 2,200 emails containing information now deemed classified, and another 22 at the "Top Secret" level.

The 44-year-old Lazar said he first compromised Clinton confidant Sidney Blumenthal's AOL account, in March 2013, and used that as a stepping stone to the Clinton server. He said he accessed Clinton's server "like twice," though he described the contents as "not interest[ing]" to him at the time.

"I was not paying attention. For me, it was not like the Hillary Clinton server, it was like an email server she and others were using with political voting stuff," Guccifer said.

The hacker spoke freely with Fox News from the detention center in Alexandria, Va., where he's been held since his extradition to the U.S. on federal charges relating to other alleged cyber-crimes. Wearing a green jumpsuit, Lazar was relaxed and polite in the monitored secure visitor center, separated by thick security glass.

In describing the process, Lazar said he did extensive research on the web and then guessed Blumenthal's security question. Once inside Blumenthal's account, Lazar said he saw dozens of messages from the Clinton email address.