OIL TROUGH, Ark. (KTHV) - UPDATE: Wainwright Jackson Humphryes, 71, was found dead in his vehicle in the area of Blackland Road. The area is near his home, according to Arkansas State Police.

ORIGINAL: The Independence County Sheriff Department is looking for Wainwright Jackson Humphryes, a 71-year-old male from Oil Trough.

Humphryes' family said he suffers from dementia, heart problems and uses an oxygen tank.

He was last seen Monday, June 11 at noon wearing gray sweatpants, a blue t-shirt and a red and black plaid button-up shirt.

He was last seen on Blackland Road, and may be driving a 1995 white Chevrolet pick-up truck with a single cab and brown toolbox.

He is a white male, 5 feet tall and 140 pounds. He has short brown hair and blue eyes.

Contact Chief Deputy Aaron Moody at 870-793-8838 with any information.