Bianca Devins was killed in Utica, New York, on Sunday morning.
The images were posted on Brandon Clark’s account on messaging app Discord, where other users told police.
They also appeared on his Instagram account and were removed but not before they had been copied and shared by other users linking to his account.Many of those other Instagram users had left comments on the remaining posts on Brandon Clark’s account, urging his followers to view the copied images on their profiles.
Then, in an attempt to drown out this spread of the images of Ms Devins’s body with her throat cut, other Instagram users started posting photographs of her alive as well as pictures of flowers and animals, using her name as the hashtag.
Brandon Clark’s Instagram account has now been removed. And the company says it is working with the police and using a combination of technology and reports from users to remove other accounts attempting to spread the images.
“We are taking every measure to remove this content from our platforms,” a spokesman for Facebook, which owns Instagram, said. “We don’t want people seeing content that violates our policies.Our goal is to take action as soon as possible – there is always room for improvement. Our thoughts go out to those affected by this tragic event.”