DAYTON, Ohio — A Sycamore Township doctor accused of being a "serial sexual predator" has pleaded guilty to making false statements in connection with a 1989 rape.

According to his plea documents, 66-year-old Frederick Louis Tanzer broke into a woman's Cincinnati condo and violently raped her over the course of five and a half hours on Aug. 1, 1989.

Masked and dressed from head to toe in black Lycra, the documents say Tanzer held a knife to the woman's throat, dragged her into her bedroom, blindfolded her with surgical tape, bound her to the bed frame and repeatedly raped her.

Officials said they were able to match Tanzer's DNA from a coffee cup he had thrown away to evidence found at the crime scene. They also found cable zip ties, restraints, a gag and a black hat inside his dress

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