She asked him to take photos (unless he's lying). While not stated, there's a good chance he asked her if he could post them online.

> and asked me to take lots of pictures of her for my memory

For his memory. Clearly it wasn't a "tell my story!" Kind of moment. Even if it was, she'd been raped the day before then tried to flee the country with no money, got arrested and thrown in prison. She was clearly in a very vulnerable state and the writer was the first friendly face she'd seen. He admits he didn't contact her before posting her face all over the internet. The pictures have been taken down now btw.

Edit: OP says she asked him to tell her story. I still think he should have asked her at a time when, you know, she wasn't at the lowest point in her life.