Sophia Bush fires back at "obsessive, violent" online stalker

Sophia Bush has reached her breaking point with someone she describes as an "online stalker."

"For the past few months I have been harassed to the point of sheer horror by an online stalker," the "Chicago P.D." actress revealed in a lengthy Instagram post on Tuesday. "This person has taken to harassing and bullying many of my followers as well. And tonight I finally said f*** this s***. This is what I posted to twitter. The photograph is a tiny sampling of over 500 screenshots I've taken in the last three months. And 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."

Bush, 32, apologized to fans who had been targeted by that same user, and added that authorities have not been particularly helpful in addressing the matter.

"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 asked. "Nope. No silence. As the evidence of staking and harassment mounts, so does my anger. Because this is grotesque."

Then, speaking to her alleged tormentor, Bush wrote, "What happened to you, you poor lost soul, that this is how you find pleasure? That you need to attempt to destroy little bits of other people to build yourself up, bit by bit? Who in your life hurt you? Who made you need to act out like this? Because my god I feel so sorry for you. But my sorrow in the face of your pain is no match for my anger at the pain you are causing others."

"You do not have the right to spread poison because you have felt poisoned. It's a small minded and ugly path to take. Choosing to inflict pain doesn't make you strong or powerful. It only proves your weakness and self-loathing," she added. "All the time you're taking to verbally harass us, threaten physical assault, and terrorize strangers? Please start spending it in therapy and learn to love yourself. You deserve it. And because none of us deserve one more moment of your bullying b*******. #gethelp #bullyingisugly #violenceisntfunny #thereisabetterway."