Four anonymous phone calls arrived at Chiara Poggi's phone on August 13, 2007, the day she was killed. The telephone traffic is one of the elements that investigators are analyzing in the new investigation into the Garlasco murder, for which Andrea Sempio is being investigated in competition.

In the ruling by which the preliminary hearing judge Stefano Vitelli had acquitted Alberto Stasi in the first instance from the charge of having killed Chiara Poggi, the attribution of four anonymous phone calls was examined. They were found on Chiara's mobile phone memory at 11:37, 12:46, 13:26 and 13:30 on 13 August 2007 : the judge concluded, on the basis of a "probabilistic" operation carried out by the experts who came "from the landline of Alberto Stasi's home". It was important to establish whether it was true that Chiara's boyfriend had repeatedly called for the girl also with his own landline and would have attested with certainty his presence at those times in her home.

The experts stated that those calls had not received an answer and therefore were not reported in the records. A "probabilistic" analysis was carried out on the frequency with which anonymous users had contacted or had been contacted by Chiara Poggi in the six months prior to the murder . 40 users were therefore extracted "with respect to which the permanent disabling function of the display of the calling number was found to be present only for the landline relating to the home of Stasi Alberto and for the landline relating to a travel agency which, however, was not operational on 13 August 2007 due to the summer closure".

(Online Union)