Attorneys for the 14-year-old Muslim boy Ahmed Mohamed, who was arrested after taking a homemade clock to his Texas school, say he was publicly mistreated and deserves $15 million.A law firm representing Ahmed Mohamed sent letters Monday demanding $10 million from the city of Irving and $5 million from the Irving Independent School District. The letters also threaten lawsuits and seek written apologies.Ahmed took his clock to school in September, and an educator thought it could be a bomb. Ahmed was arrested but never charged. He was also suspended from school.The family accepted a foundation's offer to pay for Ahmed's education in Qatar and has since moved to the Persian Gulf country.Messages left for Irving's city attorney and the district weren't immediately returned Monday.