Have a look on an archive site ArabellaScott and you can find it. I'd put a link but doing that usually gets the post deleted.
In summary the opinion piece gives an account of what happened but then does this big reveal:
But this week, during a juvenile court hearing, a fuller picture of Smith’s daughter’s ordeal emerged. She suffered something atrocious. It had nothing at all to do, however, with trans bathroom policies. Instead, like many women and girls, she was a victim of relationship violence.
Smith’s daughter testified that she’d previously had two consensual sexual encounters with her attacker in the school bathroom. On the day of her assault, they’d agreed to meet up again. “The evidence was that the girl chose that bathroom, but her intent was to talk to him, not to engage in sexual relations,” Biberaj, whose office prosecuted the case, told me. The boy, however, expected sex and refused to accept the girl’s refusal. As the The Washington Post reported, she testified, “He flipped me over. I was on the ground and couldn’t move and he sexually assaulted me.”
The boy was indeed wearing a skirt, but that skirt didn’t authorize him to use the girls’ bathroom. As Amanda Terkel reported in HuffPost, the school district’s trans-inclusive bathroom policies were approved only in August, more than two months after the assault. This was not, said Biberaj, someone “identifying as transgender and going into the girls’ bathroom under the guise of that.”
It ends sadly saying how the real story is about disinformation and people being taken in by a lie.