Amanda Knox's legal team says it fully expects her to be proved innocent at retrial.
Speaking to NBC's Today show, Theodore Simon says nothing has changed and insisted "there was no evidence before, and there is no evidence now".
Watch the interview in full from NBC News.
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Butterflies and nerves of steel were behind the images shared and seen by millions across the globe.
The Duke and Duchess of Sussex thanked everyone who took part in the celebrations on Saturday, Kensington Palace said.
Established in 1913, the flower show has become one of the world’s biggest showcases for horticultural excellence.