From the video:
Julian Assange: Whistleblowers go to significant efforts to get us material and often very significant risks. As a 27 year-old, works for the DNC, was shot in the back, murdered just a few weeks ago for unknown reasons as he was walking down the street in Washington.
Reporter: That was just a robbery, I believe. Wasn’t it?
Julian Assange: No. There’s no finding. So… I’m suggesting that our sources take risks.