The Daily Caller has a great write-up on a leaked transcript of the meeting between several Black Lives Matter activists, such as DeRay Mckesson, and Hillary Clinton:

The October 2015 meeting was kept under wraps by the Clinton campaign, who withheld a list of attendees or quotes from the meeting. The day of the meeting Hillary tweeted out, “Racism is America’s original sin. To those I met with today, thank you for sharing your ideas.” This was in response to Aurielle Marie tweeting, “I want a president who will call racism ‘america’s cardinal sin’ IN PUBLIC. & not just a private meeting with young black radicals.”

The transcript of the meeting sent from Clinton staffer Varun Anand to various members on her campaign staff show that Hillary did indeed meet with “young black radicals.”