Detectives attached to Operation Pallial say they've identified 37 suspects.
Family of Missing man speak to Heart
Roger Wilyman was last seen leaving the Rhose Fynach Restaurant Bar in Rhos on Sea at 8.15pm on 18th May 2012 - he hasn't been seen since.
Concerned relatives raised the alarm late on Friday 18th after he failed to return home, his car was later found at Trearddur Bay, Anglesey.
Police joined lifeboat crews, coastguards, helicopter crews and specialist dog handlers to search the area but he was not found.
Mr Wilyman has greying brown hair and, at the time he disappeared, he was wearing a mid blue shirt with fine weave, dark blue chinos, green-brown sport jacket with a blue line running through it and brown lace up shoes.
Anyone with information should call North Wales Police on 101 or Crimestoppers anonymously on 0800555111.
The family speak to Heart Listen here:
Three more taken to hospital after taking a chemical used as a wheel cleaner.
A London taxi driver has been killed when part of a building fell onto her car.
North West and North Wales still not out of the woods
Recently Played Tracks
Discover more about the new Sky Atlantic drama True Detective, get the lowdown on this season's unmissable TV, and win Sky free for a year.
Find your local four day weather report here.
What's happening on the roads where you are?
Make Heart the soundtrack to your day and you could be a winner with great prizes up for grabs throughout the day.
Here's your chance to find out more about some of the companies currently advertising on Heart 103.4