William Robinson was a retired navy Captain who lived in Coronado. He was killed while looking at undeveloped land in an empty canyon in the North Park area of San Diego. Robinson, who was a land developer, had been surveying a prospective development site with a friend, Dan Carnthwaite. Mr. Robinson lost his car keys and asked Mr. Carnthwaite to walk back to the office for a second set of keys. Upon returning to the canyon, Mr. Carnthwaite discovered Mr. Robinson's body. Mr. Robinson suffered stab wounds to the neck and blunt force injuries to his head.

Initial investigation didn't turn up a suspect(s), although several people were interviewed. New information is needed to continue with this case.