An absolutely astoundingly extensive look into the DNC hack by reddit user DownWithAssad can be found here (Technical) : Source
48.2. Early Independent Investigation
06/15/2016 - Cyber security firm Crowdstrike was hired by DNC to investigate hack and wrote an analysis of their findings, believing Russia to be source of the hack. Source
06/20/2016 - Crowdstrike provided another independent cyber security firm, Fidelis, their data and they agreed with Crowdstrike’s conclusions. Source
07/17/2016 - A third independent cyber security company, ThreatConnect, did an analysis of the hack and agreed with the Crowdstrike and Fidelis Assessment. Source
07/26/2016 - Threat connect later provided additional evidence for their claims. Source
48.3. Investigation by US intelligence and response
12/10/2016 – CIA believes individuals acting for Moscow hacked DNC and gave them to Wikileaks Source
12/16/2016 – FBI, DoNI and CIA in agreement Russia hacked in order to help Trump win. Source
12/29/2016 - US sanctions Russia over hacking and expels 35 Russian Intel Operatives. Source
01/06/2017 - Office of Director of National Intelligence published report detailing Russia campaign to influence election. Source
1/06/2017 - You can read the official report here : Source
3/12/2017 - In December, the Obama administration announced sanctions against Mr. Bogachev and five others in response to intelligence agencies’ conclusions that Russia had meddled in the presidential election. Publicly, law enforcement officials said it was his criminal exploits that landed Mr. Bogachev on the sanctions list, not any specific role in the hacking of the Democratic National Committee. Source
48.4. Trump
07/22/2016 – Wikileaks released 20k emails the day after Republican National Convention . Source
07/27/2016 –
Trump publicly asks Russia to hack Hillary. Source
9/25/2016 – Trump states he doesn’t know it was Russia who hacked DNC at 1st Presidential debate. Source
10/12/2016 – "Very little pick-up by the dishonest media of incredible information provided by Wikileaks. So dishonest! Rigged system! Source
12/12/2016 - “Unless you catch “hackers” in the act, it is very hard to determine who was doing the hacking. Why wasn’t this brought up before election?” Source
12/15/2016 – “If Russia, or some other entity, was hacking, why did the White House wait so long to act? Why did they only complain after Hillary lost?” Source
12/29/2016 – Trump states “It’s time for our country to move on to bigger and better things” in regards to US response to Russian hacking. Source
1/3/2017 - “The “Intelligence” briefing on so-called “Russian hacking” was delayed until Friday, perhaps more time needed to build a case. Very strange!” Source **
1/4/2017 - “Julian Assange said “a 14 year old could have hacked Podesta” – why was DNC so careless? Also said Russians did not give him the info!” - Source
1/7/2017 – Trump mentioned Wikileaks 164 times in the final month of election. Source
3/5/2017 – “Is it true the DNC would not allow the FBI access to check server or other equipment after learning it was hacked? Can that be possible?” Source
4/30/2017 - President Donald Trump on Sunday suggested that China could have been behind the series of cyberattacks that plagued last year’s election. “If you don’t catch a hacker, okay, in the act, it’s very hard to say who did the hacking. With that being said, I’ll go along with Russia,” Source
48.5. Russia
11/4/2016 – According to Intel Russia put hacking on hold * *based on Trump performance. ** Source
12/16/2016 – Russia denies hacking, demands US present the evidence. Source
3/6/2016 – Russian hackers are targeting U.S. progressive groups in a new wave of attacks, scouring the organizations’ emails for embarrassing details and attempting to extract hush money, according to two people familiar with probes being conducted by the FBI and private security firms. Source
3/7/2017 – Russian propaganda sites circulate wikileaks dump that mentions how CIA can “copy hacking fingerprints” from places like Russia, trying to clear themselves. Source
3/30/2017 - Putin says claims that Russia interfered in US elections are ‘lies’ Source
5/18/2017 - U.S. spies reportedly heard a Russian military intelligence officer bragging about his organization planning to target Hillary Clinton in May 2016. The officer told a colleague that GRU would cause havoc in America’s presidential election. Source
48.5.1 Guccifer 2.0
06/16/2016 – Guccifer 2.0 likely a Russian coverup. Source
08/12/2016 – Guccifer tweets to stone " @RogerJStoneJr thanks that u believe in the real #Guccifer2Source
08/17/2016 – Guccifier tweets to stone “@RogerJStoneJr paying u back” Source
48.5.2 Wikileaks
10/13/2016 - RT manages to tweet out the Podesta drop link prior to the official wikileaks twitter doing so, attributing it to “good journalism”. Source
01/05/2017 - Julian Assange claims no Russian involvement in DNC hack. Source