What is your reasoning for that i.e. not savvy? He was well concealed in his dress. He grabbed the lantana to cover the camera lens. That showed he was able to make do and it did work for him. He may or may not have left any DNA but it would appear whatever samples they have are not in CODIS. Therefore he has not been convicted of a felony. so, no record that shows he was a serious offender No vehicle has been identified. The police have had 1 or 2 raids and were, at this point, wrong. They can't even definitely discern if the ransom notes are authentic.
He used a bite light. Keeps his hands free. Dripping saliva all over? Where is it? He managed to overpower an 84 year old lady., reportedly somewhat ambulatorily impaired who has limited hearing and had her hearing aids out. Not a huge fete.
It would appear the only evidence they have is that she suffered some aggression as there was her blood at the scene.
He has a well known TV personality SG, pleading to him in Instagram videos which are broadcast on the internet...so no direct mailing to him. She seems to be responding to some script, as the several references from movies were obvious (TOMORROWLAND, Buffalo BILL and Silence of the LAMBS.
While many are quick to point out the shortcomings from LE, I see NOTHING, so far from the perp that makes me think he is sloppy. No one is invisible. We all exist. They can't find HIM OR NG. DNA may eventually track him down...or maybe not. He could be in some far away place by then that doesn't extradite to the USA, especially in a capital felony case, that uses the death penalty. (Arizona has the death penalty. ) He's been smart enough so far. 2 people missing. The perp and NG. No trail for either one of them, presently. Don't underestimate this guy! JMO