When Emma Laney's son Charlie stopped replying to text messages while away at university, she put it down to stress about a project deadline. After all, he was always hard at work doing something - he just needed a little space.
But on February 3 this year, she was hit with the sudden feeling that something was horribly wrong.
"I couldn't shake it," she said. "I'd left him a message a couple of days earlier telling him I was going to contact the university if he didn't reply and it got to Friday afternoon when I just had the overwhelming sense that something really bad had happened. I called Charlie's dad and asked him to phone the university".
