Little idea, meh. Maybe after you see the 1123 event (1123-B), you can see Jeff as an NPC (hostile), I could make a model for him (with a knife and such)
EDIT: Here is a little model I made of him with animations and his knife. https://www.mediafire.com/?c525b5nde1gyb37
Don't worry about your son, he will be sent to the deep dark depths in no time.