of killings including , most recently , those of Alton Sterling and Philando Castile . The BLM - centric document was leaked online by Guccifer 2.0 , the self - proclaimed hacker claiming to be responsible for infiltrating the Democratic National Committee ( DNC ) and the Democratic Congressional Campaign Committee ( DCCC ) . Many cybersecurity experts believe the persona is maintained by Russian intelligence to manage a disinformation campaign with the intention of influencing the upcoming 8 November election .