I really shouldn’t laugh, but it’s starting to look like he might have landed in Hawaii in 1969 with LIA (who died suddenly) in tow, on an Indonesian Passport in the name of BHO2 Soebarkah, and attended school for a few months, (according to images and Scott Inoue) and then again arrived in Hawaii on his own with the same passport in 1971, and this time, without a return ticket. That would have been of interest to immigration at the airport. Who is he, and who does he belong to? No matter what the Dunham couple may have said, there was no evidence to hand that tied him to this couple of elderly people.
Would love to have been there...