The family of missing Bangor woman Lisa Dorrian last night revealed: "We know who killed her."
But 18 months on, they feel they are no closer to getting justice for her murder – or being able to bury her body.
Police have carried out nine arrests in connection with the investigation. No one has been charged.
The Dorrians feel initial claims that paramilitaries were involved with Lisa's disappearance and murder put people off coming forward with details.
Patricia Dorrian, 49, said: "We know who is responsible, more or less. But he couldn't have done it on his own. An individual or individuals had to be involved.
"We believe that people were scared to come forward at the start because of the paramilitary link to the investigation.
"The police have now ruled that out. It had nothing to do with paramilitaries. Anyone who said there was did us a great disservice."
The man being blamed by the Dorrians is now in Maghaberry jail on unrelated charges. He cannot be named for legal reasons.
It's understood that he has been targeted on the wings by inmates linked to paramilitary groups.
A loyalist source said: "He is not getting an easy time, believe me. He wants to move from where he is in the jail, but that'll make little difference."
John Dorrian, 59, said the man they believe was the killer has been described as a "loose cannon".
Michelle Dorrian, 22, said she knew of him from before her sister went missing: "They used to hang around after the bars closed."
Joanne Dorrian, 23, said "that man" only started running about with her big sister Lisa in the weeks before she went missing.
"Lisa was with him in that crowd for the last six weeks she was living," she said.
Joanne said she worried that people who spent time with "this man" were too quick to forget what he is capable of.
"They are not seeing the point here, he's a murderer. He is capable of doing this again and I think this is one of the big things that is always lost in Lisa's story," she said.
"He or they are murderers and they are capable of taking someone else's life for no reason. That is what I would say to their girlfriends and friends – watch yourself and your children."
Michelle spoke of her horror at being told by the police that Lisa's body was hidden – and then moved six months later.
"It is nothing short of disgusting. That was completely planned. The day I was told that – 21st February 2006 – was the day I accepted that Lisa was dead."