FORT WAYNE, Ind. (AP) — An Indiana prosecutor is crediting genealogy databases with helping identify a suspect in the 1988 abduction, rape and killing of an 8-year-old girl, saying criminals should be worried about these powerful new crime-fighting tools.

John D. Miller, 59, was arrested Sunday on preliminary charges of murder, child molestation and criminal confinement in the killing of April Marie Tinsley. He's due to be formally charged Thursday.

Investigators examined genealogy databases in the search for Tinsley's killer, according to an affidavit filed Sunday. California investigators us...