It is unknown whether Amanda Knox and Raffaele Sollecito will appeal their murder convictions, or whether Knox could be extradited from the US to Italy.
A potential international legal battle is further complicated by US double jeopardy law which prevents defendants being tried twice for the same crime.
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America says it has "identified preparations" for an attack similar to that which killed at least 86, including 30 children, in April.
Despite the rain it will still feel muggy with highs of 22C.
The practice of sending mental health patients far away from friends and family for care has become endemic in the NHS, it has been warned.