A serial killer who terrorized Wichita during the 1970s by committing a series of seven murders has claimed responsibility for an eighth slaying and is probably now living in Wichita, police said Wednesday. A letter The Wichita Eagle received Friday suggests that the BTK strangler was responsible for the Sept. 16, 1986, strangulation death of Vicki Wegerle, who was found dead in her home at 2404 W. 13th St. The crime was never solved. The letter contained a single sheet of paper with a photocopy of Wegerle's driver's license and three pictures that apparently were taken of her body. Each...