They haven't. It is quite right and proper to investigate allegations of this sort, whoever the employer is; and also quite right and proper to maintain confidentiality until they have concluded their work.
It was, according to reports, the parents of the teenager who decided to go to the Sun newspaper, which is, of course, the way that any concerned parent would flag up such allegations, rather than go to the police or anyone in an official capacity. I am sure they will be making no money or anything out of going to the worst of the gutter press to expose their concerens about their child's alleged exploitation. It's what any parent would do. True or not.