A highway stop in which Iowa police officers pointed weapons at an innocent dark-skinned man and his 6-year-old son has prompted a federal lawsuit and racial profiling claims. Details of the September 2014 incident in northwest Iowa have emerged in a lawsuit filed by the driver, 32-year-old Levi Wilson of Orange City. He alleges the stop and search were illegal.

The Iowa Division of Criminal Investigation says officers acted appropriately because they were searching for Wilson’s brother, David Wilson, a sex offender who was wanted on outstanding warrants. Officers say the brothers sometimes drove the same truck. Levi Wilson denies that.

U.S. District Judge Mark Bennett refused to dismiss the case this month, ruling that claims of unreasonable search and seizure, excessive force and invasion of privacy could proceed.