Regarding the tax lien, here's where NYC_BULLMOOSE got his information from:
Hawaii's Bureau of Conveyances. At the site is a link to index that goes back to 1976 of their records.
Entering in Stanley Dunham returns
these results The record, R1991155273, is what NYC BULLMOOSE referenced. I don't know what's in it since I didn't order it, but it is a tax lien by the IRS