It is suspected he has other victims out there.
Hmm…I wonder if police ever looked at art students. Theoretically there should be enrollment records at the California College of the Arts dating back to when the Doodler was active. He was described as making drawings for his victims and his age suggests a college student. If he was enrolled at CCA as a student then there should be a few staff members still around who would recognize his composite sketch. I would enquire especially in the departments of comics, illustration and painting and drawing. Hopefully someone remembers his work. Assuming of course he was a student there.