Meredith Kercher was indeed murdered, but not, it appears, by some random attacker, but by her flatmates:

The flatmate of Meredith Kercher, the British student who was murdered in the
Italian town of Perugia, broke down and confessed to being involved with two
men in her death, it emerged yesterday.

Detectives said that Amanda Knox, 20, an American student who had the bedroom
next to Miss Kercher,confessed to a criminal act. Ms Knox’s boyfriend,
Raffaele Sollecito, 23, from Bari, southern Italy, and Patrick Diya Lumumba,
37, of Perugia, are also being held.

Detectives said that they believed that Ms Kercher may have been killed after
refusing to take part in a violent orgy. Police have said that they now
consider the case to be cut and dried.

The body of Ms Kercher, 21, from Coulsdon, South London, was discovered last
Friday under a duvet in her bedroom at the house she shared with Ms Knox.
She was partially clothed and her throat had been cut, it is believed, with
a penknife.