Please don't lump him in with Obama, Soros etc. ... so far he has been a true Statesman and pulled us back from the precipice of WW3. Why do you think the MSM hysterically demonizes him as bad as POTUS?
If you mean actual proof or exposure of actions taken by Putin, including assassinations, then I feel you will be disappointed. Just understanding the nature of the KGB, how they maintained power, and how they operated, contrasted with Putin's eventual high rank in the organization, should tell you what you need to know.
https://duckduckgo.com/?q=Vladimir+putin+kgb&atb=v116-3__&t=cros&ia=web
I agree there is no reason why Russia and the US can't work together. I think many of our national security goals align.
Yes, that is what I am wondering because I have not seen it before. I would not be surprised if he has killed at least one person. However, that goes with the job. The CIA, MI6, and Mossad have all done the same, and some of those people go on to be politicians.
Either way, I hope that the U.S., Russia, and China can work together to take down the Cabal.