The US soldier who led a band of sadistic guards in abusing prisoners at Baghdad's Abu Ghraib has been found guilty by a military court. Army Reservist Charles Graner stood at attention and looked straight ahead without any visible reaction as the 10-member jury read its verdict on Friday. He held his hands tightly clenched.Because the jury altered one count to a lesser charge of assault, rather than use of force likely to produce death or grievous bodily harm, his maximum sentence was lessened to 15 years from a possible seventeen-and-a-half-years, a prosecution spokesman said. The jury took less than five hours to reach the verdict. The verdict came after a five-day trial in which prosecutors depicted Graner as a sadistic soldier who took great pleasure in seeing detainees suffer. He was accused of stacking naked prisoners in a human pyramid and later ordering them to masturbate while other soldiers took photographs.