The father of one of Clifford Olson's murder victims says he's horrified by reports a website is holding an auction for some of the convicted child killer's personal belongings.

Someone claiming to have corresponded with Olson is selling the signed photos of Olson in prison, pornographic magazines, legal documents and letters on a U.S.-based website.

Gary Rosenfeldt, whose son was killed by Olson in 1981, told the CBC he's angry anyone would try to profit from murders.

"It's like a knife that cuts right through you. It's like he's taken your son again. It's like you have to relive the whole experience again. I dream about it at night. My wife dreams about it; my kids dream about it. It brings up the whole thing all over again,” said Rosenfeldt.

The Correctional Service of Canada is investigating how the personal prison items of the serial killer may have wound up for sale in an online auction.

Public Safety Minister Stockwell Day has ordered a probe into how the material left the prison. Corrections Canada has the right to restrict what prisoners can send out of prison.

Spokeswoman Melisa Leclerc said Day "is concerned with the fact that an individual would consider making profit out of a heinous crime."

Olson, now 68, is serving a life prison sentence for killing 11 children and teenagers in British Columbia in 1980 and 1981.

With files from the Canadian Press