I am not a PI but I think I might try looking in his apartment. http://english.pravda.ru/hotspots/crimes/86733-0/

Very Sad! And I thought I had no friends...

Ah, the Pravda...What is hysterical is that the lights were still on since he hadn't paid a bill in 6 yrs...no one thought to have the place forcibly opened? No one had a key--no bug men I guess, huh?

We'd miss you...maybe...

That's crazy. I bet the investigators felt pretty stupid. It's hard to believe someone could be that alone. Poor guy. Or maybe he liked being alone.

Everybody has to die sometime.

I would look under da bed first. Then call his mom and if he was there.
You just don`t go missing for 6 years and nobody check the apartment out. (Who paid the rent??)