I think the Gallagher's themselves said that TH could be seen out and about in the evening walking or biking.
We used to have a creep who walked the neighborhood CONSTANTLY. He was peeking into cars and checking the handles. If he saw YOU, see HIM, he'd solicit money or cigarettes, but ALWAYS watching what everyone was doing. My older son used to leave the garage door cracked a bit because he would grab a cigarette out there. This Gonzo creep came by with his little brother, rang our bell, son went to answer the front door...little brother slipped into the garage and grabbed what he could. Don't ask how I tracked them down and proved it...but I did! Let their father know that I was calling the police next time. Thank God they moved!
Sorry for the O/T. LOL
Back to the case: TH had a car but chose to go out biking at night. He certainly doesn't look to be out for a leisurely night of exercise. He was scoping things/people out and stealing stuff, IMO.