His Name Was Seth Rich
Seth Rich, a DNC staffer, was the one who leaked emails to Wikileaks. Julian Assange, founder of WIkileaks, hinted at Seth Rich being his source. You can see him talk about it here: Assange Interview Excerpt.
However, the “Russian Collusion” narrative was pushed instead. The leaks were used to accuse Russia of interfering in an a foreign election, and shut down the murder case of Seth Rich.
Guccifer
The original Guccifer was a real person. He was a Romanian man who had previously hacked his own government, as well as the United States.
His name is Marcel Lazar Lehel. The alias Guccifer is simply a mix between “Gucci” and “Lucifer”.
His hacks revealed the private server being used by Hillary Clinton, emails related to Libya and Benghazi, and several other large leaks. He was found guilty of several crimes.
The Russian Copycat
The DNC blamed a hacker, who they named Guccifer 2.0, for the files leaked in 2016. However, Guccifer 2.0 never truly existed, at least in the way of being a Russian hacker copying the original Guccifer.
Fake Russian fingerprints were all over the Guccifer 2.0 documents, but the entire report was written by Warren Flood, a former Obama employee. Flood also worked with the Clinton family, and currently works at Microsoft in Detroit.
The rate at which the DNC files were downloaded was faster than any modern wireless connection could handle. Meaning it was downloaded locally onto a drive from inside the DNC. Guccifer 2.0 was created to distract from the person who really downloaded and leaked the DNC documents to Wikileaks, his name was Seth Rich.