Eetu Vainonen was last seen in the Port Arthur area (now Thunder Bay) on November 15, 1935. He was 30 at the time, of Finnish descent, slim, 5 feet 7 inches tall, with brown hair and grey eyes, and was wearing blue overall pants when last seen. Records indicate he vanished sometime between 1935 and 1936, and his disappearance is recorded as the oldest missing person case in the Royal Canadian Mounted Police database.

With witnesses from that time likely deceased, the circumstances of his disappearance remain unclear and the case sparse on detail.

If anyone with family knowledge of Eetu Vainonen or information about Port Arthur in the mid-1930s can help, please share what you know.