It took place over a holiday, and I noticed he hadn't shown up afterwards. After a couple of days, I asked my boss if he was on vacation, and he said no, so I emailed him. His body and his family were found the next day by his neighbors. I actually saw his face on the evening news and my heart started racing, because they made it seem as though he was the murderer, but as events came out, he and his beautiful children were the victims.
It was really horrible because he was one of the star programmers at work and responsible for a lot of the success in the company. Everyone loved him and he deserved to be loved. It really hit our company hard, and we had things like counselling meetings but all that did was fuel our anger.
Basically there's nothing you can do. You just have to deal with it and move on. It's been 10+ years, but I'll never forget him though, he deserves at least that.