Robert Greene’s nonfiction movies are studies of processes and re-examinations of the past.

They ask how does one prepare to tell a story? Which stories are we choosing to tell? How do we depict stories that are uncomfortable or emotional? In his movie “Kate Plays Christine,” Greene documented the process of actress Kate Lyn Sheil as she was preparing to portray Florida reporter Christine Chubbuck on the day she killed herself on air, capturing the uncomfortable questions and doubts about whether or not they should even tell that story. 

His previous film, “Bisbee ‘17,” looked at a Southwestern town commemorating the 100th anniversary of an illegal deportation and the scars left behind on the local families still living there. Part of the town’s event was a re-enactment of that fateful event, an idea that led Greene to think about the premise for his latest movie, “Procession,” which premiered last week…