I really believe that an immature mind did this crime.
No argument from me! I've been saying that for a while now.
I think he was familiar with the Ramsey's and lives very close by. Maybe this person had issues with his family situation and Christmas was not a good time for him, like it was for the Ramsey's.
"Norman." That's what I call this person.
Although, I'm not sure that Christmas was a good time for the Rs. Quite the opposite.