In 2010 Moselle was walking around New York City, where she worked and lived, when she was struck by six brothers with an unusual appearance. Introducing herself to them she began bonding over their shared love of movies. She began filming them and after a year learned that they had spent the majority of their lives stuck in a small four bedroom apartment due to their abusive father's paranoia of the outside world. Moselle completed her documentary on the brothers, entitled The Wolfpack in 2015. The film premiered at the 2015 Sundance Film Festival where it won the Documentary Grand Jury Prize.