Marcus Dean Wise was 26 when he was last seen in Hermiston, Oregon, on June 18, 2015. He told his father he was taking his large reddish-brown mixed-breed dog for a walk and was reportedly seen in the Riverfront Park area that afternoon. Later the same day the dog was found wandering alone on the west side of town; Marcus himself has not been seen or heard from since.

Marcus had left his phone at home and was last described wearing a red tank top and shorts. The family printed and distributed flyers across Umatilla County, the Tri-Cities, and at rest stops toward Portland. The Hermiston Police Department opened a missing persons investigation; a reported sighting of Marcus with his dog at Riverfront Park on the day he disappeared did not produce any definitive leads. The circumstances of his disappearance remain unexplained and the case is still open.

If anyone in Hermiston or the surrounding areas remembers seeing Marcus or his dog on June 18, 2015, please come forward with any information.