A 14-year-old Muslim boy arrested after taking a homemade clock that looked like a bomb to his Dallas-area school is suing for $15 million, his attorneys said Monday.

A law firm representing Ahmed Mohamed sent letters Monday demanding $10 million from the city of Irving, Texas, and $5 million from the Irving Independent School District. The letters also threaten lawsuits and seek written apologies, the Associated Press reports.

Ahmed took the clock to his school in September and a teacher there thought it looked like a bomb. Ahmed was arrested but never charged, and he was suspended from school.

The family has since moved to Qatar after his parents accepted a foundation’s offer to pay for Ahmed’s education.