Or they saw you as a threat, and they wanted to send you a "warning." [Doubtful, he thinks. Someone probably found out Riku knew too much, or perhaps Riku just got terribly unlucky in the murder roulette.]

How many other people have you told all of this, or how many others have you shown what you just showed me?

I need to know their names if there are any, so I know who to be careful around.