The grandmother of Valerie Leblanc — the Gatineau student found slain behind her school more than two years ago — has launched a petition to convince the Quebec government to transfer the police investigation to the provincial Sûreté du Québec.

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Valerie Leblanc, 18, was found dead in a forest behind her Gatineau, Que., school Cegep de l'Outaouais, Tuesday, Aug. 23, 2011. (Submitted Photo)

Leblanc's body was found burned behind the Cégep de l'Outaouais in Gatineau on Aug. 23, 2011.

While police have received hundreds of tips since then, they have had only a few leads, including a composite sketch of a person of interest.

In the petition, posted online on Feb. 1, Huguette Leblanc said Gatineau Police have been unable to do the work because of the complexity of the case.

The Leblanc family has been critical of the lack of progress in the Gatineau Police investigation before.

She told Radio-Canada she got the idea to post the petition after noting that the Sûreté du Québec took on the double homicide investigation of Amanda Trottier and Travis Votour.

In the case of the homicides of Trottier and Votour, however, the provincial police took on the investigation because of a possible link to organized crime.

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Police reissued a sketch of a witness to be identified in the Valerie Leblanc homicide investigation, and also included a QR code (left) to download the image onto smart phones. (Gatineau Police)

As of late Monday afternoon, the petition had more than 560 signatures.

Gatineau Police Chief Insp. Marc Leduc said he understands that the family wants answers and is frustrated by the lack of movement in the case.

But he said Gatineau police do have the expertise to handle the case and said they have worked with the Sûreté on the investigation.

"We have all the competence, the experience, and equipment to do this investigation," said Leduc.