Justin Lyden Mace, 32, was last seen in La Grande, Oregon, on March 20, 2019. He is described as a white male, brown hair, hazel eyes, about five feet, seven inches tall and 160 pounds. On the day he disappeared he was wearing a black coat and blue jeans and was seen jumping into the cold, swift Grande Ronde River after an interaction with an Oregon State Police trooper on Interstate 84; a vehicle involved in an earlier pursuit was later found unattended.

Later that afternoon, after 1 p.m., a body was reported floating facedown in the Grande Ronde River and passed under the North Spruce Street bridge before being lost in the rapids. Rescue crews attempted to intercept the body with ropes but could not because of turbulent water. The Oregon State Police opened an investigation the same day.

It has not been officially confirmed that the man who jumped into the river and the body seen later were the same person. Mace is presumed to have drowned, but his body has never been recovered and the case is classified as a lost or injured missing person.

If anyone in La Grande in March 2019 saw Justin that day or has information about the events along Interstate 84 or the river that afternoon, please come forward.