Sandra Cantu disappeared March 27th. She was last seen in the mobile home park were she lives with her family.
Police have used trained dogs, aerial surveillance and boat patrols in the search. Hundreds of citizen volunteers have swept the city and beyond on foot.
Spokesman Tony Sheneman says police are shifting the focus from the ground patrol to other aspects of the investigation.
"We’ve covered all the area we wanted to. In fact we’ve covered all the area we wanted to almost twice. We’re concentrating primarily on the leads we’ve been receiving."
Fliers that include a picture and description of Sandra have been posted throughout the region. A videotape of the girl taken just before she disappeared has been distributed to the media.