Im Not Ashamed is a biographical drama film, based on what massacre involving two American spree killers Eric Harris and Dylan Klebold, who killed 13 people and wounded 24 others? 
I'm Not Ashamed: I'm Not Ashamed is a 2016 biographical drama film based on the journals of Rachel Scott, the first victim of the 1999 Columbine High School massacre in Columbine, Colorado. I'm Not Ashamed:  Scott is the main protagonist, and the story of both gunmen who committed the shooting, Eric Harris and Dylan Klebold, is intertwined with Scott's.
i don't know