I diligently kept feeding you with moths and roaches. Watching you wrap their bodies and suck out their fluids relaxed me. I noticed how you had grown, but I wanted you to be bigger and stronger. That's why I started to steal bodies for you. There was no harm in it, after all they were the dead remnants from various experiments, no longer useful and left to be disposed of secretly.
So I did just that, by feeding you. The effect of the virus on you was astounding, and in no time you had become as big as a man. Then, when I ran out of food, I sent a prisoner to the cell. They would be tortured to death by Alfred anyway. No one cared if a few went missing...