Yes. Accused. That article does not mention anything else.
I personally believe that just an accusation is NOT enough to justify that treatment. In fact I don't believe that even if she did intend to work the correct thing would have been to send her back. But an accusation?!
When transiting an international border in the US, visa status information is available to CBP along with a quick perusal of the person's social media (EU states do the same if not in a VWP program).
Her social media has shown she was working as a tattoo artist on tour in LA with dates - direct violation of the VWP because it's an employment role.
I personally believe that just an accusation is NOT enough to justify that treatment. In fact I don't believe that even if she did intend to work the correct thing would have been to send her back. But an accusation?!