I would like to have more info. First of all, though, this was no simple vacation.
The news article said that she was 18 months when they left on their "visit" but was at least 2 when they tried to return home the the US. Therefore, they were there for at least 6 months!!!!
Second, I am with those who say that the parents probably knew that they had to buy her a ticket. What I would like to know is what they were doing there for so long. I suspect that they were visiting family, but for 6 months? And, then not to have enough to buy a tix for the child? I suspect that this was some well known scheme that certain people take advantage of, although I have no proof.
I would like the news to follow up on this one. Until then, I will reserve judgment.