Keith Bennett will remain "in the possession" of Moors murderers Ian Brady and Myra Hindley until his body is found, the victim's brother has said.
Alan Bennett said the death of his mother, Winnie must not be seen as closure to the case as the family vowed to continue the fight to locate the remains of the 12-year-old.
Brady, who is 74, has been urged by police to "at last do the decent thing" and finally tell them where he buried him on Saddleworth Moor above Manchester so Keith can be given a Christian burial.
Writing on his website, www.searchingforkeith.com, Mr Bennett, who was nine when his brother was taken off the street by Brady and the late Hindley, said: "As far as I am concerned, until Keith is found then he is still in the possession of Brady and Hindley.
"Our fear as a family is that now my mother is no longer with us, this may be seen by the police and the media as some sort of closure to the case.
"This must not be allowed to happen both out of respect for Keith and my mother's memory and for those of us who loved them both."