Twenty one charges were found proven against Derek Desmond Butt by a jury at Swansea Crown Court. However, prison is not an option for the widower because he has dementia.
Instead of a usual court case, Butt was subject to a “trial of facts”, which tries to find out whether or not something happened.
Recorder John Philpotts said there were now only three options available to him:
Jurors were told the boy’s harrowing ordeal began in 2006 and lasted until 2013.
They heard Butt regularly turned up at the youngster’s house to offer his mother a break by taking her son out to the park or arcade.
However, the boy was instead taken to the paedophile pensioner’s house to be abused before being taken out for ice cream as a “treat”.
The usually happy-go-lucky youngster eventually broke his silence after he was seen bawling his eyes out while on a camping trip.
The child later told police that he was abused more than 200 times and the repeated rapes had had lasting physical and psychological effects.
The boy’s mother, who cannot be named for legal reasons, said she had no clue her son was being abused by a man who she “completely trusted”.
A jury returned its unanimous verdicts, on 14 counts of raping a child and seven of sexually touching a child, after two and a half hours of discussions.
As the foreman uttered the words “he did the acts” on all counts, the victim’s family and friends sobbed in the public gallery.
Butt was arrested in August 2013.
The decision not to stage a full trial was made on Monday after reports by two separate psychiatrists said the defendant was not “fit to stand”. The studies said there had been a marked deterioration in the defendant’s health since he was originally charged.
Butt, of Morriston, Swansea, was granted conditional bail ahead of the conclusion of his case on Friday.