OMG, the old dude next door at my old place was a murderer?

Found out way too late... It was when I was living alone. The whole story went around, but apparently, only I didn't know. I was living alone, and he ran a rice cake shop... I didn't go often, but I did stop by a few times... Kinda creepy... Seriously, you really can't tell what someone's like just by looking at their face, huh?