AceShowbiz -

Sophia Bush slammed an online stalker who had been harassing her on social media for months in an angry post on Instagram. On Monday night, September 29 the "Chicago P.D." actress took to the photo-sharing site to share a sampling of the stalker's harassing tweets which were directed at her and her followers on Twitter.

In the lengthy caption, Bush explained that the stalker had been threatening her since a few months ago and she had been gathering evidences. "I'm sharing it here to make something very clear. This kind of behavior does. Not. Fly. You do not have permission to hide. Not anymore: This has gotten beyond out of hand. Obsessive. Violent. And legally punishable," she said.

Bush has contacted police who told her, "We're on it," and advised her not to respond to the stalker. However, the "One Tree Hill" alum said she could not ignore the "vitriolic perverse monster" any longer and sent out the post.

"Law enforcement says 'we're on it,' and 'don't acknowledge this person,' but when this person, this vitriolic perverse monster is targeting all of you? Threatening rape, gang rape, & throat slitting to name a few? Impersonating me and breaking some of your hearts? Telling people they should kill themselves, and detailing how?" she added. "Nope. No silence."