Corinne June Groenenberg was 16 when she vanished from Modesto, California, on November 1, 1973. A family friend reported seeing her leave the home and walk toward the highway where she began hitchhiking; the witness last saw her get into a blue or green truck driven by an unidentified man. She has not been heard from since and is classified as an endangered missing person.

Corinne had recently moved with her family from southern California to Modesto. She is described as having brown hair, blue eyes, a strawberry birthmark on her back and a surgical scar on her abdomen. Investigations over the years produced no substantial leads and her family held out hope she might return to their former home.

Does anyone have information about Corinne’s movements in Modesto in late 1973 or recall seeing a blue or green truck that day?