A reward is expected to be offered this week for information about the murder of Bangor woman Lisa Dorrian.
Lisa Dorrian's body has never been found
The 25-year-old disappeared after a party at a caravan site in Ballyhalbert in County Down on 28 February.
Her body has never been found despite extensive air, land, and sea searches. Three men were questioned about the killing but later released.
Her family, who have appealed for the return of her body, will give details of the reward at a news conference.
They have said it is important to give her a proper burial and bring them some closure.
Progressive Unionist Party leader David Ervine has urged anyone with information to come forward.
A senior detective has said there are people in the community who can help find her body.
Graffiti in the area following her disappearance suggested a link between the case and the Loyalist Volunteer Force.
When she disappeared, Lisa, a shop assistant, left her handbag and personal belongings behind her at the caravan park.
A caravan from the site was removed for examination.
Last month, the police revealed that four members of the public had come forward with information following an earlier appeal by her family.