It may be possible to confirm family relationships by comparing test results with LeEric 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 700 markers, haplogroup R-BY62081, FTDNA kit #928575
Mitochondrial DNA test-takers in the direct maternal line:
Family Tree DNA mtDNA Test Full Sequence, haplogroup I4a1, FTDNA kit #928575
It is likely that these autosomal DNA test-takers will share some percentage of DNA with LeEric:
AncestryDNA, GEDmatch XZ3203794[compare], Ancestry member leericmarvin