The gunman watched videos of mass shootings days before the attack.
Rudy Giuliani's Ukraine ‘Investigation’ Stars Some of Kyiv's Most Dubious Characters
Trump's attorney Giuliani collects more dirt on visit to Kyiv
We've seen enough. Trump should be impeached
House Dems refresh Nixon-era impeachment report for Trump
Will impeachment be forgotten by November 2020? Don't be so sure.