The man charged in the murders of five people in rural Franklin County changed his plea to guilty Tuesday. David Ison, 46, is likely to spend the rest of his life in prison without the possibility of parole in the case known as the Laurel Five murders. He is charged with killing Roy Napier, 50; Angela Napier, 47; Melissa Napier, 23; Jacob Napier, 18; and Henry Smith, 43. All were shot to death last September after a drug deal went awry, investigators say. Ison will be formally sentenced March 14.