The problem for Italy is that Amanda was never warned according to Italian legal procedures during the interrogation. Nor was she provided with a lawyer or a neutral, fair interpreter. And she did not come to the station to provide any statement; it was extracted from her during interrogation. She retracted her statement in two memorials, written in English by her on Nov. 6 and then Nov. 7. The memorials indicate that her statements of Nov. 6 against Lumumba were extracted from her against her will. That itself is a violation of Article 3, as I understand it, under inhuman or degrading treatment.
The Gemelli CSC panel, which reviewed the two Nov. 6 statements, ruled that the first could not be used against Amanda and that the second one (the "spontaneous statement") could not be used against anyone.
However, then the Italian court system somehow decided that the statements, or her first memorial, could be used against her for calunnia. But the first memorial specifies how she was coerced to make the statements during interrogation.
So Italy is in a no-win condition before the ECHR for the violations of Articles 3 and 6.