The PSNI has renewed an appeal to find a Co Tyrone man missing for ten years.
Gerard Conway, who has bipolar disorder, was last seen in February 2007 in the Cookstown area.
Despite a number of searches and reported sightings in the Republic of Ireland and England, he has not been found.
Mr Conway was reported missing on 13 February 2007, when he was 32 years old.
His family say they fear "something untoward" may have happened to him, and say it has been a "very long ten years" without him.
"We have been left distressed, broken and devastated by the disappearance of our son, brother and father. We miss him dearly and not a day goes by that we do not think about him," they said.
Police made initial checks in and around Cookstown and extended these to the Republic and to England.
He was seen on CCTV at a bank in Cookstown a few weeks before his disappearance and there were sightings by people who knew him in late January and early February that year.
There were also unconfirmed sightings in the Magherafelt, Toome and Ballymena areas.
Widespread searches of the countryside around Cookstown, using dogs and aircraft, were unsuccessful.
"We are unable to gain closure as we have no answers and too many questions as to what might have happened to Gerard. Until we find Gerard, or recover his remains, it is simply impossible for us to properly commence the grieving process," the Conway family said.
"We feel that somebody must know what happened to Gerard, and where he is. We urge whoever it is to please, please come forward with that vital information that may help the police with their investigations to help solve Gerard's disappearance," the family added.
Detective Chief Inspector Gareth Talbot, from the PSNI's Serious Crime Branch, said he hoped the renewed appeal will help the Conway family discover what had happened.
"After ten years we still have no definite leads as to what has become of Gerard and we continue to appeal for information.
"Gerard's disappearance has been heartbreaking for his family and friends. Their own substantial efforts to locate Gerard have been commendable and they deserve to know what has happened to him."
Anyone with information has been asked to contact NI police by calling 101 or Crimestoppers on 0800 555 111.