The lower level of the house was occupied by four Italian young men with whom both Kercher and Knox were friendly.
Candace Dempsey writes that in rummaging around, looking for anything that might be missing, Romanelli inadvertently disturbed the crime scene.
Sollecito called his sister, a lieutenant in the carabinieri, for advice.
She advised him to call the 112 emergency number, which he did.
Guede had been invited into the lower level flat by some of the Italian tenants, to whom he had attached himself. Also in mid-October, Kercher and Knox attended the Euro Chocolate festival.
On 25 October 2007, Kercher and Knox attended a classical music concert where Knox met Raffaele Sollecito, a 23-year-old computer science student By Knox's account, having spent the night with Sollecito, she arrived at Via della Pergola 7 on the morning of 2 November 2007, finding the front door open and drops of blood in the bathroom she shared with Kercher.