The American cameraman vanished during an overnight fishing expedition off California's San Pedro coastline between 30 June (05) and 1 July (05). Although the boat and all its crew returned to land, all that remained of McDermott was his personal possessions, including a fishing rod.
And while Newton-John, who recently released her new album STRONGER THAN BEFORE, refuses to go into detail about the ongoing investigation, she does say, "As you can imagine, it's really a very, very difficult thing to go through.
"It's hard to talk about and I've chosen not to because it is painful and because there's a young son involved and a lot of speculation. But we know nothing, and it's still under investigation.
"It's very shocking because in the beginning I was just kind of frozen. Then you have to move forward a little bit and it's one of the reasons that I decided to sing again. I didn't think I was going to sing again, but I had to move forward - particularly after recording this album, which is all about going through difficulty and coming out the other end. I had to walk the walk."