Yes but it is incorrect.
"new evidence - not grounds enough for an appeal"
I'm not sure what you're referring to.
In a civil case, an appeal is virtually automatic in PT, assuming that the basic conditions have been met. However, it seems to be limited to a reappreciation of points of fact or law that were deemed not or insufficiently taken into consideration at the lower level.
In a criminal case, the right to appeal appears to be the same, but I'd have to check, again, whether an appeal in a criminal case follows the same logic.
To double-check, yet again, as it is most definitely on here somewhere, my recollection is that the Supreme Court examines points of law (on the reasoning that by that stage, disputes of fact should have already been resolved).
I still haven't found whether the concept of a retrial actually exists or not in PT.
What I find confusing in this case is that the torture trial was separate. The result of the torture trial was that it was accepted that she had been tortured. That wasn't sufficient to throw the case out of court, however. There were still the facts of "common experience" such as children normally arrive home, therefore Joana did and all the other "facts" of a similar nature.
As she didn't take the stand, any confessions made by her due to torture were deemed inadmissible in court and were therefore almost irrelevant.
The fact that she eas alleged to have already confessed according to the media, and that judicial secrecy had been blatantly flouted in the media prior to the trial involving a jury - whose appreciation counted as much as those of the judges, wasn't even raised as an issue.
What resulted in her conviction was the "reconstruction" made by João in which he apparently involved her (or was made to say so). The fact that she didn't even take part in that reconstruction wasn't even questioned.
My understanding is that, if - for example - Joana had turned up alive (or her remains found), there would have been a new investigation.
In the meantime, whatever the legal imbroglio, there is nothing of substance that I can find as to what actually did happen to her.