Amanda Knox murder case is getting to be more and more complicated with new characters giving their opinion. This time, renowned DNA expert Dr. Peter Gill, took the side of the UW student as her attorney insisted absence of evidence.

According to Digital Journal, Dr. Peter Gill offered his professional assessment in his book "Misleading DNA evidence: reasons for miscarriages of justice."

The DNA expert studied two of the prosecution's main evidence used in the Amanda Knox murder case: the knife found in ex-boyfriend Raffaele Sollecito's kitchen drawer and the bra clasp, which was collected 46 days after Meredith Kercher was killed.

He said that low profile is what he would expect "to observe, if it had originated from a contamination event," which is what the defense and Amanda Knox supporters have been claiming as they questioned the procedure of gathering of evidence by the Italian police.

Then there's the bra clasp, and the DNA expert weighed in on the evidence towards the end of his book.

"There is strong evidence to show that the failure of investigators to change their gloves in between handling items and potentially touching door handles is high risk, giving credibility to the defense proposition that Sollecito's DNA was transferred as a result of cross contamination," he said.

Various blog sites observed that the Italian police who gathered the evidence did not change gloves as often as standards would require, allowing for contamination.

Meanwhile, lawyer Theodore Simon, who got involved in the Amanda Knox murder case trial in 2009 when she was initially convicted, also spoke of the case. The attorney was instrumental in getting her conviction overturned during the appellate trial.

"There's only one thing that is consistent about this particular case: There's a compelling and profound absence of evidence. It's a nightmare that should end, and it's completely and wholly unjust," he said.