Soul singer and arranger Isaac Hayes, who won Grammy awards and an Oscar for the theme from the 1971 action film "Shaft," has died, sheriff's officials in Memphis, Tennessee, reported Sunday. Relatives found Hayes, 65, unconscious in his home next to a still-running treadmill, said Steve Shular, a spokesman for the Shelby County Sheriff's Department. Paramedics attempted to revive him and took him to a hospital, where he was pronounced dead shortly after 2 p.m., the sheriff's department said.