Good for the mother for following up with police. My guess is there’s no father in the picture so the perv thought the boy would be an easy target. (I’m assuming, perhaps incorrectly, in these incidents the father is typically the one who’d deal with the school and the cops).
“....... the school’s response was to move the location of the student’s locker to a different floor ...
Yea, that would definitely work. (sarc)