4 points Employers will often require drug testing of an employee under the following circumstances: upon hire all of the choices are correct after a work-related accident if an employee appears to be impaired In Treasury Employees v. Von Raab, the U.S. Supreme Court held that drug testing of persons seeking to hold positions in drug interdiction, or to carry firearms: O none of the choices are correct was lawful if implemented with good intentions did not violate the 4th Amendment O violated the 4th Amendment