An Illinois doctor has pleaded not guilty to murder charges in the December shooting deaths of his ex-wife and her dentist husband in their Columbus home. Thirty-nine-year-old Michael David McKee of Chicago appeared remotely from jail for his arraignment in Franklin County on Friday. He faces aggravated murder and aggravated burglary charges in connection with the Dec. 30 killings of 39-year-old Monique Tepe and 37-year-old Dr. Spencer Tepe. After the release of a videotape sparked dozens of tips from the community, investigators pursued McKee to Rockford, Illinois, where he was arrested Jan. 10. He was returned Tuesday to Ohio.