Police say a renowned Alzheimer's disease researcher has died after being hit by a car in Ohio, and the man suspected of hitting him also has been found dead.

Police say 45-year-old Mark A. Smith was struck early Sunday as he walked along a road in Bainbridge Township. Police say they found the car that hit Smith about a mile away.

Chief Jon Bokovitz tells The (Willoughby) News-Herald that the 50-year-old driver, Daniel Neesham, was found dead inside the car. Police are investigating how he died.

Smith was a pathology professor at Case Western Reserve University in Cleveland and director of basic science research at the university's memory and cognition center. He was executive director of the American Aging Association and co-editor-in-chief of the Journal of Alzheimer's Disease.

A coroner's spokesman says Smith's death was an accident. Further autopsy results are pending.