I also found your family tree and saw your entry for death location as Oregon.
The Social Security Death Index's Last Residence field isn't always where the person died. Soc. Sec. use that field for other purposes too.
I'd try to get a copy of his obituary assuming he lived in Redding.There is a Shasta County obituary volunteer at cagenweb.com/shasta/lookups.html .Let me know if her email ID doesn't work. Successful Searching!