Ok that is one explanation for no DNA on Luke , I must admit I am having kittens here wondering what your explanation is about no DNA on Jodi or the crime scene, in fact lets take into account no DNA on anything Luke would have touched,door handles,carpets and almost everywhere in his house including the sanitation system all revealed nothing incriminating.
Yes the Murder was 5:15 so about 1 hr and 10 mins after school.
Was it a hunting knife that killed Jodi john?
Not so strange that she couldn't get a teenage boy to wash, he never did wash as per forensic examination of luke and the whole sanitation system of the house.