Three people besides Robert Pickton were originally arrested as suspects in the investigation in the murder investigation, the lead RCMP investigator in the case testified Monday.
RCMP Insp. Don Adam told the B.C. Supreme Court jury that two women and men were arrested as suspects in the investigation, along with Pickton.
In the New Westminster court on Monday, Adam told jurors he lied to Pickton during the videotaped interview.
Adam said he told Pickton he contracted Hepatitis C from prostitutes when officers knew he likely received it from some kind of incident at a hospital.
The RCMP inspector also said he misled Pickton on the amount of Sereena Abotsway's blood that was found in the farmer's motorhome.
Earlier in Adam's testimony, jurors heard him say the investigation at Pickton's Port Coquitlam pig farm was so extensive that police used up the entire country's supply for white contamination suits.
Every forensic lab in the country was stretched thin during the investigation, Adam said.
Police used more than 400,000 swabs of DNA and brought nine trailers onto Pickton's Port Coquitlam pig farm during the investigation, the RCMP inspector said.
"This is the largest, most expensive search that has been done in Canadian policing," Adam said.
Police believed someone was targeting women from Vancouver's Downtown Eastside even before finding body parts on the pig farm, court heard.
"The one thing we did know is that the victim pool came from the Downtown Eastside and we absolutely believed that somebody is going into that Downtown Eastside and taking them out," Adam said.
Officers spoke to investigators sifting through the rubble of the Sept. 11 terror attacks in New York to learn how they dealt with finding body parts.
Police systematically searched the farm starting with the motorhome, where they thought the investigation was centred.
"You don't go onto a farm like that and start rushing around as though you are on some Easter egg hunt looking for a hot piece of evidence...you take baby steps," Adam said.
Adam, then a staff sergeant, was one of those who questioned Pickton in a videotaped interview from 2002 that was shown to the B.C. Supreme Court jury last week.
Jurors heard Pickton tell police he got "sloppy" cleaning up, near the end of an 11-hour interrogation as police grilled him about DNA and body parts found on his farm.
During the first few hours of the video, jurors heard Pickton dismiss any connection between himself and the missing women as "hogwash."
Pickton faces first-degree murder charges in the slayings of six women, who are Marnie Frey, Sereena Abotsway, Georgina Papin, Andrea Joesbury, Brenda Wolfe and Mona Wilson.
Pickton also stands accused in the murders of 20 other women but no trial date has been set on those charges.
With files from The Canadian Press
