DNA at centre of Knox appeal

PROSECUTORS at Amanda Knox’s appeals trial on Saturday battled it out with independent forensic experts who say some of the key DNA evidence used to convict the US student of murdering her British roommate in Italy in 2007 was unreliable and possibly contaminated.

Prosecutor Manuela Comodi sought to undermine the expert’s conclusions and show that the forensic evidence used to convict Knox could stand.

The experts — who were appointed by the court to review the evidence and the procedures used to obtain it — maintain that the original investigation was marked by some glaring errors.