Jagger calls for halt to execution
Lawyers for the convicted killer of an American policeman, have launched a last minute appeal to try to stop his execution.
Troy Davis' lawyers argue that Davis was a victim of mistaken identity. Seven out of the nine witnesses have now withdrawn their evidence against him.
Bianca Jagger is the Council of Europe's Goodwill Ambassador on the Death Penalty and an executive member of Amnesty International.
She says the evidence against Mr Davis is virtually non-existent.
21 Sep 2011