But at least two people killed Kercher plus all the circumstantial evidence. The faked robbery, not calling the police, not mentioning about the locked door when the postal police came, changing stories repeatedly, mentioning they slept till 1030 when a computer had been used for half an hour at 0530 and Sollectio phone being switched on, Amanda Know having had here earing ripped out and a scratch on her neck, Sollectio extremely strange phone call to the police, DNA on the knife and DNA on the bra strap. There may be no "smoking gun" but, at the same time, you can maybe explain away a few of these things but there is just so much evidence.
For about two hours last night I was reading this...
http://forumserver.twoplustwo.com/34/other-other-topics/amanda-knox-innocent-american-trial-italy-cold-blooded-murderer-648983/index444.html
and although the guys belives in her guilt it was still a great read. Starts at 6642.