We still don't know who he is or whether he works for the Russian government, but one thing is for sure: Guccifer 2.0—the nom de guerre of the person claiming he hacked the Democratic National Committee and published hundreds of pages that appeared to prove it—left behind fingerprints implicating a Russian-speaking person with a nostalgia for the country's lost Soviet era.
Exhibit A in the case is this document created and later edited in the ubiquitous Microsoft Word format. Metadata left inside the file shows it was last edited by someone using the computer name "Феликс Эдмундович." That means the computer was configured to use the Russian language and that it was connected to a Russian-language keyboard. More intriguing still, "Феликс Эдмундович" is the colloquial name that translates to Felix Dzerzhinsky, the 19th Century Russian statesman who is best known for founding the Soviet secret police. (The metadata also shows that the purported DNC strategy memo was originally created by someone named Warren Flood, which happens to be the name of a LinkedIn user claiming to provide strategy and data analytics services to Democratic candidates.)