Her search might help others find their missing family members.
Elizabeth Gill, then 2, disappeared from the yard of the family's home on South Lorimier Street in Cape Girardeau in 1965.
Hamilton is searching for her long-lost sister and attended a TeamHOPE meeting in Dallas over the weekend to connect with families and volunteers searching for missing people. TeamHOPE is a program of the National Center for Missing and Exploited Children.
A recently discovered old police report could provide clues for Hamilton or other missing children's families, Hamilton said.
Investigators used the police report to gather information on a group of "gypsy travelers" who might have snatched Gill from the yard and disappeared with her. The travelers were staying at a nearby hotel and family members twice saw them beckon to Elizabeth to come to their car. They had ordered an automobile part to be picked up from a local dealership, but they never showed up.
Cape Girardeau police are following up on any leads they can find, chief Carl Kinnison said.
"We've just been trying to follow up on anything that appears. You realize, the more the word gets out, babies have been abducted, the more chances there are that somebody could hear the story of someone who had been in a similar circumstance and see a picture and say, 'Hm, that looks like me,'" Kinnison said.
Hamilton said there were oddities in the Midwest woman's birth and adoption records that gave Hamilton hope that she had found Gill, but the DNA proved the woman was not her sister.
"Even though it was not a match, the circumstances, timing, age and incident report all tie together," Hamilton said. "There seems to be some kind of link there."
324 S. Lorimier St., Cape Girardeau, MO