A police sergeant has admitted he made errors and omissions in documents he compiled for the investigation into Ciara Glennon's murder, the Claremont serial killings trial has heard.
Sergeant Gary Hyde took photographs and notes at the Eglinton bushland site where the 27-year-old solicitor's body was dumped, and gave evidence for the second day at Bradley Robert Edwards' WA Supreme Court trial.
The 51-year-old former Telstra technician denies murdering Ms Glennon, 23-year-old childcare worker Jane Rimmer and 18-year-old secretary Sarah Spiers in 1996 and 1997.
Defence counsel Paul Yovich poked holes in Sgt Hyde's work during cross-examination, getting him to admit documentation mistakes and oversights.
It included not noting the time certain exhibits were collected and incorrectly listing the location of an insect nest found near the body.
"I did the best I could to record what I thought was relevant at the time," Sgt Hyde said on Thursday.
He conceded he had "probably made lots of errors" in his career, agreeing with Mr Yovich that was part of being human.
Sgt Hyde agreed his evidence at trial relied heavily on referring to the documents, given he couldn't independently recall much more than two decades later.
He also agreed that meant his evidence could be incorrect.
When asked about missing minutes from the crime scene video, he said there were times when the recorder was not running as the battery was changed or a fresh tape was inserted.
Sgt Hyde also testified every exhibit was "generally" photographed in-situ as it was collected back then, but it was now "pretty much" mandatory.
The court also heard from Senior Sergeant Alexander Wells, who took photos at the Eglinton crime scene and sifted through some sand, and said he did not touch the body.
He said he and other police wore overalls of varying blue hues.
Prosecutors allege fibres from navy Telstra-issued Yakka clothes were found on Ms Glennon, Ms Rimmer and a 17-year-old girl Edwards has admitted raping in Karrakatta Cemetery in 1995.
The court previously heard the police overalls were also made by Yakka and the defence argues contamination of evidence is a "live issue".
Prosecutors allege fibres from the interiors of the kind of car Edwards used for work were found on Ms Glennon and Ms Rimmer.
They also say DNA found on the rape victim and on a kimono left behind at a Huntingdale home where he attacked an 18-year-old woman as she slept in 1988 matches DNA found under Ms Glennon's fingernails.