The mystifying case of little Nathan O’Brien and his grandparents, Alvin Liknes, 66, and Kathryn Liknes, 53, continues to shock the city of Calgary. this morning (Monday, July 2, 2014) the boy’s father, Rod O’Brien, has suggested he may offer a $100,000 reward for the recovery of his son. The boy, who is five, was on a sleepover at his grandparents. When his mother arrived to pick him up about 10 a.m. yesterday she found the home empty. Calgary Police issued an Amber Alert and the search has continued since. Police say evidence found in the Parkhill home suggests their disappearance may be suspicious. It appears the grandparents may have been forced to leave their home. They had been in the process of an estate sale at the residence. “When we went to the address and after speaking with family members, the home was not in the condition it typically would have been left in,” said Kevin Brookwell from the Calgary Police Service. He has blond, curly hair and brown eyes. He was last seen wearing peach-coloured shorts and a striped-blue hoodie. Global News