NBA star Reggie Bullock has been a big proponent of transgender rights thanks to his sister Mia Henderson, who was sadly killed in 2014 for being a transgender woman. Her killer, Shawn Oliver, was acquitted on all counts. Bullock, who supported his sister throughout her life, became an advocate in her honor. The latest 6-minute documentary from Vice showcases his journey to NYC Pride, an NBC Voices For LGBT Voices Event for LGBT Youth and Allies in New York to speak on her behalf and for the rights of LGBT people across the country. Jason Collins, the league's first openly gay athlete, was also a part of the LGBT Voices event and spoke about Bullock's platform as a straight male in the NBA. Obviously, Reggie has a connection being an ally and having a transgender sister killed a few years ago. A credit to him that he's using that pain and that platform to speak out on these issues because we need more and more athletes to speak up to help change the culture of sport. "I actually didn't know how many lives actually get taken within that community until my sister's life was taken," said Bullock. "Actually, looking that numbers of what goes on with the transgender community, particularly dealing with African Americans, it's a super-high rate." "I'm just trying to use my platform, whatever I can do, to save lives and try to bring equality within that community." READ MORE: 'Happy Together' Gets An NBA Surprise In This Week's Episode Lee Daniels Says He Plans To Helm The First Black Gay Superhero Movie, Starring This Viral Sensation