Defense

-The knife doesn't match the shape and size of wounds on Kercher's body or an outline of the knife left on her bed
- The bra clasp is contaminated and essentially tainted evidence because it was moved around the crime scene and left there for more than six weeks before it was picked up as evidence.
- Knox's statements were made when she was asked to imagine what would have happened that night in her house. The defense said Knox pointed the finger at Lumumba because she was confused and pressured. Eventually, the confession was thrown out because Knox was not questioned with a lawyer present.
-Forensic experts who said the print was in no way a match to Sollecito, but instead a match to Rudy Guede
--Several pieces of key DNA were contaminated at the scene. Crime scene video shows investigators sometimes not wearing gloves or hair coverings, prodding their fingers in Kercher's wounds, leaving key pieces of evidence at the scene for weeks and moving them around, and at one point breaking a window for no reason.