Complex sentence: Dashiell's immediate superior wants to bring Red Crow to justice for the murder of two FBI agents thirty years ago, when Red Crow was a militant Native American rights activist alongside Dashiell's mother, Gina Bad Horse.
Split into simpler sentences: Dashiell's immediate superior wants to bring Red Crow to justice for the murder of two FBI agents thirty years ago. When Red Crow was a militant Native-American rights activist, alongside Dashiell's mother, Gina Bad Horse.