Gregory is missing with his brother, Richard Evans (MP #37432), since 02/21/1975. Richard, who lived in Lincoln City, had asked Gregory to help him move back to Kennewick, WA. The two were reported missing after they failed to show in Kennewick. According to family, Richard was to appear for a job interview and Greg was to return to Kennewick High School.
Richard's vehicle was located a few days later on a roadside bluff overlooking the Pacific Ocean south of Lincoln City. Searches of the area found no sign of the brothers. (Information retrieved from NamUs.gov)