The genius Phd student dummy took his cell phone (tracking device) with him when stalking the house multiple times and had it on him when he committed the crime. And he parked his car near the house when he was stalking and and when he committed the crime ( obviously caught on multiple traffic cams) . And he didn't ditch the car linking him to the area and house.
Very simple things to avoid for a crime expert
He sent his saliva in for genetic testing in the past so he voluntarily put himself in a national DNA database
