Calgary police have expanded their search for an 11-year-old boy named Parker, who has been missing since Thursday.The search now involves the entire city, with residents urged to check their properties for any signs of the child.Parker was last seen in the Thorncliffe neighbourhood and is described as non-verbal, autistic, and functioning at a two- or three-year-old level.Authorities have released CCTV footage and are reviewing over 50 hours of security camera recordings.The family has expressed deep concern, stating they are living 'every parent's worst nightmare.' Police emphasize that Parker may not respond to his name and could become frightened by strangers.Emergency alerts have been issued, and search teams including air support, canine units, and mountain bike units are actively involved.The provincial government provided additional resources, with 74 search and rescue personnel assisting in the effort.Anyone with information or footage is urged to contact police.