The sister of missing Trevor Deely has told how the recent developments in the case, including specialist gardai digging for his body, were "like torture" for his family.
Despite disappointments in the 17-year search for the truth about her brother's disappearance, Michelle Deely said the family will never give up.
In September, a six-week search of a derelict site in Chapelizod was brought to an end with no trace of Trevor.
"The theories about what happened to him were horrific. To go through that whole six weeks you're waiting by the phone every second," said Michelle.
"I never thought I would say this, but it was worse than standing by the canal on week one after Trevor went missing."
This, as well as other developments, including the release of enhanced CCTV footage of the night bank worker Trevor disappeared in December 2000, has taken its toll on the family, especially Trevor's parents.
Michelle said it has been "a terrible year" for them.
"If one of us was missing, Trevor would never give up on us. We're trying to put an end to this misery for Trevor and especially for our parents," she said.
"We've been left fractured, and this year has really had an impact on our parents since the appeal, the reward, the CCTV images released in April and also the August search.
"We aren't looking for anything other than to find Trevor, we're not on a justice trail, it's just to find my brother.
"As awful as August and September were for our family, that was somebody doing exactly what we've been asking for.
"We had the search and now we're still nowhere. Something happened to him because he doesn't just vanish - somebody knows something.
"We're still relying on that person or persons coming forward. All our hopes are pinned on someone who has yet to tell anyone what they know.
"It's never too late. We're simply trying to put an end to this misery for our mum and dad."
Trevor, a Bank of Ireland worker, was last seen in the early hours of December 8, 2000, in the Haddington Road area of Dublin.
The last known images of him were captured by a CCTV camera on Haddington Road at 4.14am.
A man dressed in black, who gardai believe also spoke to Trevor outside his place of work, can be seen following him.
As the anniversary of Trevor's disappearance approaches, Michelle has issued an appeal for anyone with information about what happened to him to contact Pearse Street Garda Station, the Garda Confidential Line or Crimestoppers.