When her conviction was overturned by an Italian court that amounted to an acquittal.
In the US, if an appellate court sets aside a jury verdict, that's not the same as an acquittal.
“In the US, if an appellate court sets aside a jury verdict, that’s not the same as an acquittal.”
From the article:
“The court overturned the couple’s acquittal”
This is what our courts will look at, where double jeopardy comes into play.