29 years ago, a family of 4 vanished but RCMP are still investigating

It's not common to hear of an entire family vanishing into thin air.

But that's what happened nearly three decades ago, when the Jack family left their home on Strathcona Avenue in Prince George, B.C., heading to a logging camp, where they had been offered jobs.

Ronald and DoreenJack, both 26, and their two children Russell, 9, and Ryan, 4, were last heard from during the early hours of Aug.2, 1989, when Ronald called his mother in the Burns Lake area.

Since then, Doreen's sister Marlene Jack has fought to keep the case and some hope alive.

"It just blows me away that my sister has been missing for 29 years," she said. "I just want to bring them home."

Now, on the anniversary of the disappearance,investigators with the Prince George RCMPare renewing calls for information and specifically seeking an anonymous tipster who they believe could have useful information.

RCMP say the tipster provided information to a third party by phoneand then mail which was then passed on to investigators.

The RCMPwon't say when this happenedor what the information was,as it could compromise the investigation.

But investigators want to speak directly tothe original tipster, in hopethat they could provide a fresh lead.

Thousands of documents, no leads

"We do believe that there are persons out there whohave informationand just haven't come forward or, for whatever reason, are reluctant to," said Cpl. Craig Douglass with the Prince George RCMP.

"So we would like them to take that step and contact us so that we can resolve this and solve this three-decade mystery."

He said the investigation has involved "thousands of documents and lots of details," but that none have yielded a breakthrough.

Marlene, who was 23 when her sister, brother-in-lawand two nephews disappeared, testified about the case during hearings at the national inquiry into Missing and Murdered Indigenous Women and Girls in Smithers, B.C. in September 2017and was praised for the commissioner for her bravery.

But she said it's been difficult to keep up hope.

"It's a long process.They have to go through all the boxes and stuff.It's just frustrating when I'm hearing the same thing, nothing new, nothing new," she said.

"Even the coronerin Prince George is telling me how much they care about the family, and they're praying that the family is found and yet nothing is done.The case is still on the back burner.I'm trying to push it and get it off this back burner and get the investigation going."

Marlene said as police renew a call for information, she's feeling "kind of anxious, worried, hopeful."

"I would really like to know where my sister is and her family, and I want to bring them home. Twenty-nine years has been a long time not knowing what happened to them."

• Missing and Murdered Indigenous Women and Girls profile: Doreen Jack

In astatement from the RCMP,Douglasswrote that the disappearance "has greatly impactedmany for three decades, but none more than their family and friends."

"Having information about what may have happened to the Jack family must weigh heavy on anyone with it."

Anyone with information about Ronald, Doreen, Russell and Ryan Jack and what happened to them, is asked to contact Prince George RCMP at 250-561-3300 or, to remainanonymous,contact Crime Stoppers at 1 (800) 222-8477.

With files from WilFundal and Robert Doane