Serial killer toys with Kansas authorities

WICHITA, Kan., Oct. 27 (UPI) -- A notorious serial killer, known as BTK for "bind, torture and kill," has resumed a cat-and-mouse game with Kansas authorities.

Police in Wichita, Kan., say a letter received this month might be from BTK, who has taken credit for eight unsolved murders in the city from 1974 to 1986, the Wichita Eagle reported Wednesday.

This past March BTK broke years of silence by sending to the newspaper a letter in which the unknown suspect took credit for a 1986 killing that had never publicly been linked to him or her.

Since then, detectives have investigated as possible BTK letters ones sent to a TV station, the police headquarters and a public library.

Officials think BTK is between 50 and 70 years of age.