Charlie Says -- Film Description:
"Three young women were sentenced to death for the infamous Manson murders. Their sentences became life imprisonment when the death penalty was lifted in California. One young graduate student was sent in to teach them. Through her, we witness their transformations as they face the reality of their horrific crimes."
-- Epic Level Entertainment

Source:
"Charlie Says" Epic Level Entertainment. https://epiclevel.com/portfolio-item/charlie-says/. [official site]