Disappearance of David Reuben Boniske

On July 23, 1977  David Reuben Boniske was last seen in his home in Olympia, Washington. The 21 year old was a college student at Evergreen State College. His disappearance is suspicious his car was found stripped and abandoned in Seattle, Washington. His telephone card and credit cards he typically used were not used afterwards.  He also left behind several items he'd never leave behind. He left some checks and cash at school, along with his hang glider and camera.

David is  white male and was 21 at the time of his disappearance. He had brown hair and hazel eyes. He was 6'5 and 170 lbs. He does wear glasses.

SOURCES:
http://www.charleyproject.org/cases/b/boniske_david.html
http://www.doenetwork.org/cases/1266dmwa.html
https://www.findthemissing.org/en/cases/17959/147