The defence team of an Italian suspect in the murder of British university student Meredith Kercher on Friday carried out further tests in the house in Perugia where Kercher was killed in November 2007.
The lawyers of Raffaele Sollecito, 24, sent a ballistics expert and a specialist in crime scene reconstruction to the house to calculate the trajectory of a rock which broke a window on the night of the murder.
Sollecito's defence team argue that an intruder broke into the house through the window in the room of one of Kercher's flatmates and then murdered the student.
Prosecutors say Sollecito, his 21-year-old American girlfriend Amanda Knox and 21-year-old Ivory Coast national Rudy Guede, who has already been convicted for the murder, broke the window in an attempt to simulate a break-in.
The trial of Sollecito and Knox will begin on January 16.
British exchange student Kercher, 21, was found semi-naked and with her throat slashed on November 2, 2007 in the house she shared in Perugia with Knox and two other Italian women.
In a fast-track trial that ended in October, Guede was found guilty and sentenced to 30 years for sexually assaulting and murdering Kercher.
The prosecution claims Kercher was killed when all three suspects tried to force her to participate in ''a perverse group sex game''.
The suspects deny the charges.
