DNA recovered during Rayney probe

Up to two male DNA profiles were recovered during the investigation into Corryn Rayney's murder that could not be matched to people in a national database, the trial of her estranged husband Lloyd Rayney has heard.

Forensic scientist Laurance Webb told the WA Supreme Court trial on Wednesday that the DNA profiles, one of which was only partial, were found but could not be matched.

Mr Webb said the DNA profile was weak and there was only a 'low level' indication of a second person.

The court heard Rayney, a prominent Perth barrister, could not be 'included or excluded' as a potential source of the DNA found on a handkerchief at Ms Rayney's grave site.

Under cross-examination, Mr Webb agreed that DNA results from a street directory inside Ms Rayney's car indicated at least three people, although it was unclear if Rayney was one of them.

He also agreed that DNA recovered from the CD button in Ms Rayney's car and from her debit card indicated a male who was not Rayney.

Mr Webb also gave evidence about a cigarette butt found outside the Rayney's home, which the court previously heard was DNA matched to a person 'well known to police'.

A full DNA profile was recovered from the butt, indicating that it had not been there for a long time, Mr Webb said.

The cigarette butt was among items found on a footpath during a police search on August 22, 2007.

The prosecution alleges Rayney murdered his estranged wife at their home in August 7, 2007 and then dragged her across the front yard to her car before burying her body head-first in a bush grave at Kings Park.

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DNA recovered during Rayney probe