But only those who have experienced the excruciating torment of not knowing where their loved one may be can truly understand the couple’s constant agony.

The Nevilles will be among those gathering for an information and support session at Corrimal District Library on Friday hosted by the Families and Friends of Missing Persons Unit.

Co-ordinator Liz Davies said the event was designed to give families a chance to expand their support network and seek advice.

‘‘Really it’s an opportunity for families to meet others in a similar situation, to share with each other helpful tips, things that have helped them cope with having someone missing and just to draw support from each other,’’ she said.

On a September afternoon in 2008, Bobby Neville, then aged 30, left his parent’s Coledale home to go for a walk and never returned.

Since that day Bob and Sue have not stopped looking for their son and believe he is alive, possibly working in the mining industry.

Although more than three years have passed, Mr Neville said his loss was the kind time didn’t seem to heal.

‘‘Whenever the phone rings, especially late at night, there’s always the thought in the back of your mind that it could be Bobby, or news of Bobby,’’ he said.

Initially wary of attending support meetings, Mr Neville said he now drew deep comfort from speaking with other families.

‘‘You get feedback from people who are going through what we are, that understand exactly where you’re coming from,’’ he said. ‘‘It’s a hard world but there’s other people doing it just as hard; it makes you realise that you can be a help to other people just talking about your experiences.’’

To RSVP call 1800 227 772.