This mystery was a pleasure, and a challenge, to solve. At first glance, it appeared to be an easy case, as there were many close matches, but in the end even “easy” can be deceiving. All names and some identifying descriptions, such as ages and places have been changed.
Please note: The full report also included all sourced materials, including death certificates, census reports, newspaper clippings, etc. It also included family group sheets, charts of DNA matches, and other historical information as evidence of these findings.
To determine Evan Thompson’s biological father.
In 1997, Evan Thompson was born in Richmond, CA to a 37 year
old woman named Emily Thompson. Emily passed away when Evan was a child, and
never told him who his father was. In
2017, Evan took an Ancestry.com DNA test in hopes of learning more about his
heritage and in 2019 turned to Family DNA Finder for help untangling his DNA
When I first looked at Evan’s Ancestry family DNA matches, I was able to
quickly divide the majority of the matches into two groups: 1) Maternal &
2) Unknown, but presumably Paternal. I first marked each of the maternal
results that he recognized from his mother’s family with a pink dot designating
it as being from his mother’s side. Then I looked at each of those family
members’ shared matches with Evan and marked them also with a pink dot.
Eventually I had about 30 people marked as being probable maternal side
matches. I then looked at Evan’s list of DNA matches and marked anyone who
didn’t have a pink dot with a dark blue dot. This was the first division
between maternal and assumed paternal results. A pink dot meant maternal side;
a dark blue dot meant paternal side.
My next step was to look at his highest “dark blue dot” matches, which were in the 572 cM-200cM range. The two highest matches were Harvey (572 cM) and Cletus (374 cM). These two had a lot of DNA matches in common with each other, which led me to believe that they were from the same side of the family. I took a look at all of their shared matches, and marked them with a red dot. I then looked at the family trees of the shared matches and found a set of common ancestors, Scott Purdue and Bertha Vinson. Using genetic genealogy charts, I could tell that Harvey & Cletus’s cM levels would have them be about two to four generations away from Evan. Scott Purdue and Bertha Vinson could be Evan’s grandparents or great-grandparents. I created an extensive family tree for Scott Purdue and Bertha Vinson, looking at each of their 6 known children and each of those children’s children, etc. The information was found using Ancestry databases & records, other family trees, obituaries, newspaper archives, social media posts, and other online records. I found that Evan’s high matches, Harvey and Cletus, were first cousins, and their grandparents were Scott Purdue and Bertha Vinson
I then looked at the next set of Evan’s matches that a) were not maternal matches, and b) also did not match the Purdue/Vinson family. This was so I could perhaps find more shared sets of ancestors that would eventually divide into paternal grandparents or great-grandparents, etc. Evan had quite a few clusters of matches that were relatively high in cMs, meaning we wouldn’t have to look too far back to find a common ancestor. Right away I found a common ancestor couple named Joseph Graca and Maria Chavis. I did the same as I did for the Purdue & Vinson couple, and created family trees for all their descendants, siblings, parents, and grandparents.
As I followed the Graca & Chavis family, I found they had two daughters
and one son. The son and one daughter had descendants who tested on Ancestry
and who matched Evan in the 300 cm range, which made it less likely that they
would be Evan’s parent or grandparent. I took a closer look at the remaining
daughter, Theresa Graca, and found a few things that seemed to stand
out. One, her age was in line to be a grandparent to someone born in 1997.
Second, she had lived in a county that was geographically close to where Evan
had been born. Third, she had a son whose age was in line to be Evan’s father. But
more investigation needed to be done before making a determination.
Over to the Purdue and Vinson family, they had 6 children, and all but two had stayed close to their home state, Texas. The two who hadn’t, Gerome and Phillip, had moved to California around the same time. I decided to look closer at those two. They both were similarly aged, and could both be old enough to have a grandson born in 1997. They both lived in Northern California, though one, Phillip Purdue was a couple of hours away from Richmond, CA. The other brother, Gerome Purdue, had lived in a county adjacent to Richmond. Phillip had been married for a long time, and all family trees linked to Gerome showed he had never married. This still didn’t mean that either of them, or even their siblings, could be ruled out as a grandparent to Evan.
I spent some more time on Theresa Graca’s immediate family and history. She
had been married twice, and had two daughters and a son. The son, Sam McKay,
seemed like an excellent candidate to be Evan’s father. He hadn’t married, he
lived near Richmond, CA, he was the right age, and his relationship to those who
had DNA tested from the Graca family fell within the expected range for him to
be a father to Evan. But there was an issue. In order to be Evan’s biological
father, he would also need to have ties to the Purdue/Vinson family who Evan
had a lot of close matches with.
I was able to formulate a family tree for his father’s side, the McKays, and
there was no connection to the Purdues or Vinsons. This left me with two
possibilities: a) he wasn’t Evans birthfather, b) he wasn’t actually his presumed
I decided to take each possibility one-by-one. If Scott McKay wasn’t Evan’s birthfather, then who was? I looked closer at Theresa Graca’s records. She had passed away several years prior. This meant that she had a social security file that was indexed on Ancestry. One line was tucked in it, just a small footnote: in 1962 she had changed her name to Theresa Purdue.
There was no marriage record found, no divorce record, no internet or
newspaper notation somewhere that made any mention of a marriage between
Theresa and a Purdue. All we had was one small clue hidden away in an index.
Evan and I decided to reach out to Theresa’s children to see if they would
be willing to shed some light for us. We had gone as far as the records and DNA
could take us. My theory was that Theresa and Mr. Purdue (and I had to make an
educated guess that it was Gerome Purdue, based on his brother being married at
the time and other siblings living many states away), had placed a baby boy for
adoption, and that son was Evan’s birthfather. The other possibility was that
Mr. Purdue was the biological father of Sam McKay, but the timing wasn’t
perfect on that, with him being born several years before Theresa changed her
name. That wasn’t out of the realm of possibility, but it was a theory that I’d
return to later if my original theory was wrong.
We contacted Theresa’s daughter, Kelly, and she very graciously gave us some
very important information. Yes, her mother, Theresa Graca, had placed a son for
adoption around 1962. She didn’t know much more than that, as her mother had
told her this 40 years ago, and then passed away. She did not recall a Mr.
Purdue, not as a step-father or other presence in her life (she was under five in
1962). She had found one piece of paper where her mother had disclosed she had
changed her name to Purdue, but nothing other than that.
I took that information and started looking at the California Birth Index. I searched for a boy born between 1960-1963 in Contra Costa County with a mother’s surname as Graca. I found one born in May, 1962. He was listed without a first name, just his mother’s surname and a father’s surname as McKay – not Purdue. I was able to connect with a person who had more information from the California Birth Index than I did, and who could check to see if a California birth certificate had been re-issued in another name, but the same certificate number, as is done in California adoptions.
The information came back – the boy I found born in May 1962 had been
adopted and his new name was Travis Jessup.
My next step was to get any contact information I could for Travis to give
to Evan. Unfortunately, I soon found out that Travis had passed away.
I gave Evan all the information I could about Travis, including about his adoptive family. We found out that Travis had a daughter who was a bit older than Evan and lives not very far from him. Travis’ (adoptive) brother was able to give a photograph of Travis to Evan, and pass on some of his story. All of the information the brother knew from the adoption lined up with what we had found out. Evan is now in contact with his biological half-sister.
This began very straight-forward, with lots of high DNA matches with wonderful,
accurate family trees on Ancestry which pinpointed the most recent common
ancestors of Evan’s biological father. What we weren’t expecting was to find
that it was in essence a double mystery – an unknown father who had unknown
parentage himself. Nonetheless, using DNA and intensive genealogical research, the
search was completed successfully.