[reledi]

The details of the story seem unlikely and it was probably sloppy journalism, but I haven't found anything besides speculation that claims it happened otherwise.

It doesn't appear anything was lost in translation:

https://news.ycombinator.com/item?id=5864882

https://news.ycombinator.com/item?id=5864653

https://news.ycombinator.com/item?id=5864577

I think the likeliest case was that they searched her laptop, found an open tab with her Facebook messages, then printed the conversation.

[tedunangst]

That's fair. But "Border agents can read your private messages" conveys a rather different idea than "Border agents can read tabs you leave open".

[reledi]

It sure does, but that's still just speculation. I think the story carries more weight than my speculation. Ultimately, we'll never really know what happened.