This week, USF researchers have returned to the controversial Dozier School for Boys in Marianna, Florida.
Crews are expected to use cadaver dogs and ground penetrating radar as they search for additional burial sites of children who died at the former reform school. The school has become notorious for alleged abuse and unexplained deaths.
Researchers are in Marianna following up on leads they received while excavating there back in December.
During that last visit, crews announced they had discovered 55 sets of remains on the grounds near the Boot Hill cemetery, more than state records indicated.
Investigators have launched a nationwide search for living family members to help identify the remains that were discovered.
They want to connect relatives with loved ones buried at Dozier.
"I'd like to get one, and then we can go from there," said Hillsborough County Sheriff Office Major Robert Ura.
To make a connection, investigators need relatives to submit to a DNA swab.
Researchers at a lab at the University of North Texas will help determine whether it matches the DNA of the remains that have been found at Dozier. Major Ura admitted it will be tough.
"I think the chances on some of these aren't better than finding a needle in a haystack," Major Ura said. "I think if you really look at the numbers and the number of people who have come and gone in the state of Florida over the last hundred years, it's going to be a difficult task to get all of the remains identified."
The Sheriff's Office has fielded about a dozen calls since word spread about the remains that were discovered at Dozier.
Major Ura said one person said they may be related to a student who died there. Investigators are looking into the call.