KNOXVILLE, Tenn. — After Jackie Harrison, 76, was separated from his family in the Halls Walmart, the Knox County Sheriff's Office is asking the community to keep an eye out for him.

He was wearing blue jeans, a polo short and a brown jacket when he was separated Sunday night, according to the sheriff's office.

Harrison has dementia, the KCSO said in a Facebook post, as well as several medical conditions requiring medication.

Knox County Sheriff Tom Spangler would like to thank our Reserve Uni... t for ensuring the safety of the participants in the Heart and Sole 5k at Sacred Heart Cathedral! The Knox County Sheriff's Office Reserve Unit is such an important part of KCSO.

Anyone who sees Harrison, or anyone who may have information that could help the sheriff office find him, should call KCSO at (865) 215-2243 or call 911.