Prosecutor announces that the victim's blood and a possible murder weapon were found in Staff Sgt. Louis Perez's car. Another woman, who lives at the same address as Perez, has also been charged with murder.SAN DIEGO — A Marine staff sergeant pleaded not guilty Thursday to a charge of murdering the 22-year-old wife of a fellow Marine as the prosecutor announced that the victim's blood and a possible murder weapon were found in the defendant's car.