Authorities are searching for a former Waukon, Iowa teacher. They're looking for 83-year-old Don Angel.

The Allamakee County Sheriff says he has dementia and was last seen at 4:30 Monday afternoon.

Angel may be in his silver Chevy Impala with a license plate reading "HALO." He was wearing a green polo and blue shorts.

Anyone with information is asked to call the Allamakee Co. Sheriff's Dept. at (563) 568-4521.