Sharon Advocate listed him as killed in while serving in the military on Nov 2, 1953. Interestingly his grave only gives the Hebrew date: 24 Heshvan, which also corresponds to Nov 2. I will assume the grave is correct. 

The online entry at the below site lists the death date as Nov 1. https://www.findagrave.com/memorial/100369736/leonard-michael-sandhaus

E. Ganin Jun 2026