John Kercher, whose daughter Meredith was killed in 2007, told ITV News that there is nothing to celebrate today: "You don't celebrate guilty - you celebrate closure and we still don't have that.
"That's all we want. We want it to end. It's been over six years and we still have another judicial process ahead now."
He added that the American media were jumping to conclusions when they say Amanda Knox could escape extradition under the double jeopardy law."They have not been tried twice so double jeopardy should not come into this."There has only been one actual trial. This was an appeal being re-done.
"Now they can take this to the Supreme Court... to say they have been tried for the same crime twice is not right."
More top news
The family of a wealthy British man has claimed he was murdered by his Ukrainian bride in Kiev so she could inherit his fortune.
Medics and flight crew had been rescuing an injured skier when they crashed in the region of Abruzzo.
A story of two halves