If she was forcibly raped by seven men (and resisted), unless she was a married woman who had born a child, she would have had injuries.
That alone should have resulted in a “headsup”.
Apparently the supposed attack on "Jackie" included significant violence, including being punched in the face, knocked through a glass table, and being attacked for hours while glass shards cut her. The story reported that she was bleeding as a result of her injuries.
It seems inconceivable that the first person seeing the victim wouldn't have themselves called for medical assistance and the police. It seems equally inconceivable that anyone hearing the description of the alleged crime did not immediately seek to involve outside professionals, like the police, a rape crisis center, or, if they didn't believe the story, a counselor or psychologist.
Whatever actually happened to the young lady, prompt professional intervention is justified whenever somebody reports such an extreme story.