Amanda Knox has been cleared for a second time of murdering British student Meredith Kercher at the cottage they shared in Italy in November 2007. The decision handed down by Italy's highest court puts an end to seven years of legal wrangling.

Knox, together with her former Italian boyfriend Raffaele Sollecito, were originally convicted of the murder in 2009. They were acquitted on appeal two years later because of doubts over the forensic evidence, but their convictions were reinstated in January 2014.

Ruth Alexander asks what might have influenced the Italian Supreme Court's decision as she returns to interviews gathered last year with some of the key players in the case.

The programme features contributions from:

The original version of this programme was broadcast 20 February 2014.

Reporter: Ruth Alexander

Translation by Santo Cullura and Helen Grady

The readers were:

Matthew Watson (reading the words of Francesca Maresca)

Clive Hayward (reading the words of Valter Biscotti)

David Cann (reading the words of Giancarlo Costagliola)

Wilf Scolding (reading the words of Antioco Fois).