Here is what the sheriff said and to me means the person is a local and know to people. So I am ruling out the ice cream man and stranger...
"While case investigators have received a tremendous response from the public and hundreds of leads have been called in followed to their logical conclusion ... we have reason to believe there are individuals that have information that is pertinent to this investigation who have yet to come forward because they did not feel that their information was important or relevant."
"Someone in the community will unknowingly be associated with that offender and may be in a position to observe those behavioral changes," Beseler said. "They may not realize or relate those changes to the person's involvement in a crime."
Good observation. It's got to be someone within a few miles if not one mile of the school or 1080 Gano Ave.