Nothing is being done to Epps while the exmilitary girl was shot from behind by a cop without provocation. He was exonerated for the murder even though the girl was just standing around according to news reports.
The video of Ashli Babbitt taking a bullet is available to anyone who wants to see it; there's no need to rely on "news reports".
She wasn't "standing around"; she was halfway through a window into a barricaded hall. And the imbecile cop who shot her wasn't behind her, he was off to her left but facing her.