I believe the "rune like" symbol is actually some personal rendition of the Hebrew consonant "hey". I cant read or speak Hebrew but spent a few hours looking through grammar information- perhaps the bottom three dots are supposed to be tribute to Aleph and Dalet (side smaller dots) joining as Hey (center larger dot). Alternatively, potentially the symbol is meant to face a completely different way than the picture for Doe and was actually another Hebrew consonant like "Vet".
The Hebrew Letter Hey.
www.hebrew4christians.com
View attachment 605345
I believe the cross tattoo is the Cross Potent, which is also associated with the Jerusalem Cross.
en.wikipedia.org
The best match i have found so far is Michael Lee Pickering though i am not entirely confident. He went missing in 1971 (left to hitchhike to San Francisco per family from Victorville CA and was never seen again) so he would have aged 7 years in the photos. Michael is also a common Jewish name from the Hebrew phrase "who is like god" (Mikha'el).
Riverside Doe is not listed on Pickering's exclusions.
Any thoughts?