My sister and I separately had DNA tests done a few years ago. We lived over 7,000 miles apart and were not in regular touch. I noticed that Ancestry showed an unknown nephew. I couldn't work out how to raise it with her before she took ill and died of old age last month because dementia started kicking in; however, I'm glad that we did reestablish contact. I tried to contact the nephew via Ancestry, but he's not been online for over a year since getting his DNA results.
I think I know many circumstances relating to their relationship because she was in her rebellious stage and brought home circa 1960 an enlisted airman of another race to prod my mother (it worked) but as the younger brother I got along with her boyfriend well. Anyway, she went back to the University of Arizona (where she worked really hard to flunk out) and was gone for several years, during which time I went away to school and never saw her again except briefly when I brought my first wife to the Reservation. Fifty years passed, she found herself, built a good U.S. Public Health Service career, married, had a child, etc. So that's the background.
So there's an entire branch of my family tree that is blank and, yes, my nephew is half African-American and I feel like an important part of my heritage is missing.
I'm sure that this isn't all that uncommon, so I'm interested in hearing any suggestions as to how to proceed (other than a private detective or other expensive method). Any ideas?