The Montreal police still believe they know who killed Jolène Riendeau, and that someone, somewhere knows it too.

In an attempt to get that person to come forward with the final piece of information the police say they need to make an arrest and get a conviction in the 12-year-old case, six anonymous donors have put up $30,000 in reward money.

The reward is being managed by Sun Youth, and the charity organization's director says a little financial incentive can go a long way in getting people to come forward.

"Since 1991 we were involved in 54 cases, and we solved 21 of them," Sid Stevens told CTV Montreal's Catherine Sherriffs on Tuesday. "So rewards have helped in 38 per cent. Hopefully it will work in this case as well."

Riendeau was 10 years old in April, 1999 when she disappeared after visiting her neighbourhood dépanneur.

Her remains were discovered in the fall, though it was only announced three weeks ago.

Police made an arrest two days after the announcement, but released the suspect after a long day of questioning.

Montreal police Sgt. Ian Lafrenière said that 47-year-old man remains the primary suspect in the case.

"We still believe it is the right person at this moment, but we need more information to accuse him and bring him to justice," Lafrenière said. "We think with the help of the public it's going to happen."

Anyone with any information on the case is asked to Info-Crime at 514-393-1133.