FARMVILLE, Va. — Richard Alden Samuel McCroskey III rapped about the thrill of murder in songs he posted on the Internet. Police believe the fantasy lyrics became a gruesome reality in a small Virginia college town. McCroskey, 20, was being held Sunday in the killings of four people who were found at a Longwood University professor's home near campus in Farmville, which is about 50 miles west of Richmond. McCroskey, of Castro Valley, Calif., faces charges of first-degree murder, robbery and grand larceny of an automobile, said Farmville police Capt. Wade Stimpson. The aspiring rapper in the underground horrorcore genre,...