BBC:
The Independent Police Complaints Commission is investigating the way the case of a man raped after being wrongly branded a paedophile has been handled.
The South Wales Police inquiry into the rape itself has been wound down.
Meanwhile victim Geoff Cole, from near Neath, has been told if he wants to take the person who began the rumours to court he must do so himself.
Detectives believe that the lies spread about Mr Cole led to the attack near his Resolven home in October 2005.
Mr Cole has been told criminal action cannot be taken against whoever began the rumours, as it is a civil matter.
Earlier this year, Mr Cole waived his anonymity as a rape victim and contributed to a BBC Crimewatch reconstruction of the attack, which happened as he walked his dogs in heavy rain at 2245 GMT on 18 October, 2005.
He was dragged to the ground and attacked moments after seeing a man loitering alongside the road and apparently talking into a mobile phone.
For months there have been no new leads in the case and police have scaled down their investigation.
But officers believe they know who began the rumours in the weeks before the rape.
Det Insp Jeff Handley said that at a party Mr Cole had been referred to as a paedophile.
"Mr Cole is not a paedophile, he is not a sex offender - Mr Cole has done absolutely nothing wrong and we've worked on the assumption that this attack on him has come about as a result of that rumour, gossip, and speculation," explained DI Handley.
The news has come as a blow to Mr Cole and his wife Jill.
Mrs Cole said "one person's vengeful, hateful mouth" had "started this and destroyed us, there's no other way to explain it".
"For us to get justice, we have to take this person to court ourselves, is that justice? I don't think so."