Although there was blood inside Robert William Pickton's motorhome in Port Coquitlam, B.C., it doesn't appear to have been the site of a fatal blood letting, a blood stain expert said Tuesday.

Jon Nordby testified for the second day at the B.C. Supreme Court in New Westminster.

Pickton, a pig farmer, is on trial for the deaths of six of the women who went missing between 1997 and 2001 — Sereena Abotsway, Mona Wilson, Andrea Joesbury, Brenda Wolfe, Marnie Frey and Georgina Papin.

Robert Pickton is on trial for the deaths of six women who went missing from Vancouver's Downtown Eastside.
(Jane Wolsak/Canadian Press)

Nordby, a forensic specialist who helped to recover human remains at the World Trade Center site after the Sept. 11, 2001, attacks, said he studied dozens of photographs of the motorhome's interior, most of which are photographs of stains found on the walls, appliances and furniture.

He told jurors the poor quality of the photos made it difficult for him to identify and interpret the characteristics of the stains. In some cases he said he couldn't tell whether they had been made by blood or a different substance.
 
"The point is that all the stains that have come back to Mona Wilson, for example, have been very small stains. Either small enough to be removed when testing or thereby obliterated, or have been on items that move about and so on," Nordby said.

"There is no sense that I have that with those stains located in such disparate areas of this vehicle that they are associated to a single blood shedding event," he told jurors.

The Crown alleges the bloodstains in Pickton's motorhome were that of Wilson.

Pickton is facing 26 counts of first-degree murder in total in connection with the deaths of women from Vancouver's Downtown Eastside. He is currently on trial for six of the deaths and will be tried on the remaining 20 later.

He has pleaded not guilty.

In February, jurors heard from a now retired RCMP blood spatter expert who testified he believed there had been a "blood letting" event in the motorhome.

Nordby testified that the stains inside the motorhome could have been produced over a length of time and there's nothing to suggest they came from one event where a lot of blood was shed.

During his Monday testimony, Nordby said microscopic examinations of large stains on a mattress did not, in fact, look like blood.