Security guards at the federal courthouse in Washington are under investigation for accepting baseballs autographed by star pitcher Roger Clemens after his criminal trial. The guards are not allowed to accept gifts from a criminal defendant. The U.S. Marshals Service said in a statement that it appears up to six baseballs were given to a guard who distributed them to four or five colleagues. Clemens went through security entering the courthouse during the six days of his trial last month on charges of lying about using performance-enhancing drugs.