Chris Kilcullen, 43, who had been a police officer in Eugene for 12 years, was killed Friday in nearby Springfield, KMTR-TV reported. Springfield police are leading the investigation.
Cheryl Dawn Kidd was being held in the Lane County Jail, KVAL-TV in Eugene said.
Springfield Police Chief Jerry Smith said Kidd led police on a high-speed chase on back roads before she was arrested.
A candlelight vigil was planned Saturday for Kilcullen at city hall in Eugene, KMTR said.
Aaron Carter is still in love with Hilary Duff
Boston schools pull out free condoms over wrapping complaints