He wasn't killed, he was discharged. But more interestingly I have found a second enlistment for him, using a different second name. This time he enlisted in Sydney, NSW and stated his locality as Corowa, NSW, which is on the Victorian border. He can be found on the nominal roll at http://www.ww2roll.gov.au/script/name.asp#searchtabs
Only type P for second name in the search to see both Nominal Roll records. On the second enlistment he has dropped his birth date by exactly 1 year to the day. He still listed his birth place as Richmond, Vic. This time he was discharged in 1946. You can purchase his service record $16.50 within Australia or $15 from overseas. Just email email@example.com
for details on how to do it. You will need to purchase both the Victorian and New South Wales records to get his full servcice record. I got my father's a while back and it included a front and side photo of him from shoulders up.