By The Canadian Press

VANCOUVER, B.C. - RCMP are wrapping up their investigation into six more missing women whose DNA was found on Robert Pickton's farm, but whose killer has never been charged.

Cpl. Annie Linteau said Thursday that investigators are preparing to turn over to the Crown their report into the six cases, but the report makes no recommendations.

Linteau said justice officials have already said they won't proceed with charges in the cases of Nancy Clark, Stephanie Lane, Jacqueline Murdock, Dawn Crey, Sharon Abraham and Yvonne Boen.

"We have been advised by Crown verbally that they would not be proceeding with charges in relation to these six women. However, we are still sending them that information to complete the process," Linteau told The Canadian Press.

"Fully knowing what the Crown has said in the past, we still have a responsibility, the police do, to conduct a thorough, detailed investigation and we need to be sure to fully inform Crown of all of our findings...."

Pickton was arrested in 2002 and charged with 26 counts of first-degree murder in the disappearances of women from Vancouver's Downtown Eastside, most of them drug-addicted prostitutes.

He was tried on only six counts and convicted in December 2007 of second-degree murder in all six after a trial that lasted almost a year.

The Port Coquitlam farmer was sentenced to life in prison with no parole but his lawyers have appealed his convictions to the Supreme Court of Canada. A B.C. Appeal Court has already rejected his request for a retrial.

The Crown has said that if the second-degree convictions stand they will not proceed with any further charges against Pickton, but if they're overturned, they'll go ahead on all 26 counts.

The report to Crown essentially wraps up the investigation into the six outstanding cases of women whose DNA was identified on Pickton's farm.

While justice officials will not proceed with any charges if Pickton's appeal fails, and have 20 of the original charges yet to take to trial, Linteau said they still need the information on the last six "should further trials be required."

Linteau would not comment on the evidence gathered by police in the six cases.

Some of the families have been frustrated that no charges have been laid in their deaths, although their DNA was found on the farm belonging to the convicted serial killer.

Linteau said RCMP made contact Thursday with the family liaison who has been dealing with the dozens of families touched by the investigation on Pickton's farm.

"The families were aware of their loved ones' DNA having been located in the past on the farm property. I'm not sure, however, if they were aware of us being in the process of sending that information to Crown," Linteau said.

Linteau said she does not know of any further charges coming against Pickton.

"This is to complete the process," she said.