Federal officials are investigating flutes, possibly contaminated by bodily fluids, that were given to students from school districts all across Southern California as part of an investigation of an individual accused of inappropriate sexual conduct. Several school districts alerted parents on Friday the California Department of Justice and the U.S. Postal Service launched an investigation and to turn in the flutes to authorities. The flutes are colorfully decorated and painted by students all over Southern California through a program called "Flutes Across the World."