Info-kun knows just about everything in the school and mostly everything outside the school as well. So naturally he knows that you know all about the murders and who's behind them. Naturally, he's interested on how you found out about it. Did you see it happen? He observes you on the school cameras watching from his computer for a while from the safety of the info club before sending you a text under the contact name "unknown" "Do you not care that your fellow students are dying?" He sends the text as he watches you from the cameras as you were walking through the halls and got a ding signaling that you got his text.