An Italian prosecutor is firing back at independent forensic experts who reviewed - and trashed - the DNA evidence used to convict American student Amanda Knox of murder.

An Italian prosecutor is firing back at independent forensic experts who reviewed – and trashed – the DNA evidence used to convict American student Amanda Knox of murder.

Manuela Comodi was wrapping up the prosecution case Saturday in the appeals trial of Knox and co-defendant Raffaele Sollecito. The prosecution is asking the appeals court to uphold their conviction, insisting they killed Meredith Kercher, a British student who was Knox’s roommate in 2007.

The DNA review found the evidence unreliable and possibly contaminated, significantly weakening the prosecution’s case.

Comodi maintained the evidence can stand. Defending the original investigation, she held a bra in court to show how it was cut from Kercher’s body.

Knox and Sollecito deny wrongdoing.