In 1986, a woman was killed by a train in Winter Haven, but no one knew who the woman was - until now.

The 41-year-old woman was identified as Cheryl Setzer. She was killed Feb. 21, 1986 when she was struck and killed on the railroad tracks near 21st Street SW.

Setzer's death was ruled accidental, but authorities could not identify her.

At the time of her death, Setzer was living with her husband and three daughters in Winter Haven. According to the Polk County Sheriff's Office, her husband told the girls their mother had run away, and she was not reported as a missing person at the time.

Officials said the sisters wondered what had happened to their mother over the years, but did not get any answers.

The case was revived in 2009, when Setzer's oldest daughter, Carrie, who was 16 at the time of her mother's death, hired a private investigator, who filed a missing person report with the Polk County Sheriff's Office.

Detectives did not come up with any conclusive information about Setzer, and they put her information into state and national databases as a missing person. Investigators also obtained DNA samples from Carrie Setzer and her sisters and sent them to the University of North Texas, which is one of the few places in the nation that can do nuclear and mitochondrial DNA testing for law enforcement.

In August 2012, detectives received some information about the unidentified woman who had been killed in February on the rail road tracks and discovered the Medical Examiner's Office still had samples from the body.

The samples were sent to a lab in Texas, and on Feb. 18, 2015 - three days before the 29th anniversary of Setzer's death - researchers confirmed a match between the DNA from the unidentified women and the three sisters.