“You don’t get it! It- It wasn’t supposed to end up like this!
I did not killed myself!
It’s a lie!
Can someone hear me?
There is a virus!
There is a virus on the system!
There is a virus on the system and it want us dead!”

Ghosts sometimes want to say important things, but cannot be heard. 

Okay so Sotheby supposedly shot himself. 

Hes dead. 
This guy made two beings out of electronics. He made Qiji, a Ai capable of almost feeling and a failed project that became a virus. This virus wanted him dead- and managed his way to do it.