In December 1982, a trucker reported seeing a body in the frigid, murky waters of the Escatawpa River in Jackson County, Mississippi. At daybreak, investigators found a baby girl floating near the bridge. The community called her "Delta Dawn." The inscription printed on her headstone is "Known Only to God."
"There's a lot of people that cared deeply for that child," said Jackson County Sheriff's Office Sgt. Eddie Clark.
Clark was in grade school when it happened. Now, decades later, an investigator decided there might be a shot at solving the Delta Dawn mystery using DNA analysis and online genealogy.
That's where Olivia McCarter enters the story.
"I watched Bones when I was a kid, and that's what I decided to do," said McCarter.
Through her internship, she helped identify a John Doe who'd drowned in Missouri in 1979 and a Canadian killer who raped and murdered a 9-year-old girl in 1984.
“Some of us cried ourselves to sleep because we couldn't solve it quick enough," said McCarter.
It was her third case that hit closer to home: finding out who Delta Dawn was. Growing up in Grand Bay, Alabama, McCarter knew about the case.
"I had visited her grave before, before we got the case," said McCarter.
"How come?" I asked.
"Just to do it. Somebody had to remember," said McCarter. "We think of cases as our family."
"I recognized her talent even before the internship, “said Anthony Redgrave.
Redgrave is the lead forensic genealogist at Redgrave Research Forensic Services, where McCarter interned. Delta Dawn's case proved challenging for them. McCarter and her team had to solve two adoption cases before beginning to figure out Delta Dawn's family tree.
"There's so many cases that don't stand a chance unless they're solved this way," said Redgrave..
Delta Dawn had a name: Alisha Ann Heinrich. Investigators say Alicia and her mother, Gwendolyn Clemmons, were last seen leaving Joplin, Missouri, before Thanksgiving in 1982 as they travelled to Florida with her new boyfriend. Alicia and Gwendolyn were never seen again. Gwendolyn's body has never been found.
"We're still looking. We're still trying to find out exactly what happened," said Clark.
A mystery partially solved due to DNA analysis and the dogged determination of investigators, including an unlikely one still earning an undergraduate degree at South.
Buried next to Delta Dawn is an unidentified newborn who was found floating in the Pascagoula River in 1988. Solving that case is next on McCarter's list. She plans on becoming a forensic anthropologist.
How DNA was used to solve a south Alabama mystery