What remains in the absence of evidence is the truth.
here's what we do know, the hackers who hacked the DNC and Podesta, left footprints behind, signatures that our intelligence agencies found, that MATCH the same Russian signatures left behind that hacked the Ukrainian elections, and same signature footprint left behind when the Russians hacked the Ukrainian electric grid, and same signature left behind on the recent hacking attempt of Vermont's electric grid with the same malware, that allows them to break in....
that's pretty compelling evidence....even without anything more being released on it, to NOT disregard the intelligence community's assessment so far.... imo.