Calgary police are reining back a large-scale ground search for Parker, a missing 11-year-old boy, after 12 days without finding him. Police announced the change Monday. They said the search is not over, but efforts are moving away from large physical searches toward following tips and evidence. Parker has been missing since July 16. “Based on operational needs, the information currently available and the results of the search to date, we are refocusing from the physical search,” police said in a written update.