Disapearance of Duke

As most of you may know i have been chatting online to my best friends brother Duke, well i have been getting a little worried because i have not talked to him in like 5 days or so. I know it seems silly to be getting worried over it. I know that he works 12 hours a day and he may not always be available or on when i am but he hasn't even left me an offline message or anything like that. The main reason i am freaked out is because the last conversation i had with him was about him having a dream he was gonna get killed!! Scary i know, and now i haven't talked to him in about 5 days!!!! His sister ( my best friend) also has a weird feeling that something bad has happened. I just hope that we are both wrong.