The Missing Children's Network held a march to mark the unsolved kidnapping of a young boy that led to the network's creation 25 years ago.

Eight-year-old Sebastien Metivier was one of three boys who went missing on Nov. 1, 1984.

The other two boys were later found murdered but Sebastien's body was never found.

His family took part in the march on Sunday in the neighbourhood where the tragedies took place a quarter century ago.

His mother, Christiane Sirois, still hopes that Sebastien will be found alive at age 33.

"It was the end of my life and that of my son, she says.

Police think they might know who was behind the kidnappings and killings, but they'll never know for sure.

The main suspect in this case committed suicide the night before he was to take a lie detector test.

Jean-Baptiste Duchesneau was in jail for sexually assaulting a child. Years earlier, he had killed a six-year-old with a hammer.

Peace

The march was meant to help bring peace to the family, says Pina Arcamone, head of the Missing Children's Network.

"Someone, maybe in this very area, must have information about Sebastien's whereabouts," Arcamone told CTV's Catherine Sheriffs.

"We would love to give the family the gift of closure."

Mourning continues

The family's wounds were still raw 25 years later, said Sebastien's sister.

"I look for him in my dreams," she said, her voice cracking with emotion.

At the end of the march, 25 balloons were released into the sky -- one for each of the years Sebastien has been gone.