Dave Mackler's DNA has been tested for genealogical purposes. It may be possible to confirm family relationships by comparing test results with Dave or other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree:
Family Tree DNA Y-DNA Test 111 markers, haplogroup R1b1b2a1a2f*, FTDNA kit #626893
Mitochondrial DNA test-takers in the direct maternal line:
Family Tree DNA mtDNA Test Full Sequence, haplogroup H1-C16239T, FTDNA kit #626893
It is likely that these autosomal DNA test-takers will share DNA with Dave: