Kristen Jackson had been at the Wayne County Fairgrounds on Sept. 9 with her older sister and friends and was last seen walking toward the main gate to meet her mother.
Sheriff Thomas Maurer confirmed Monday that the head and limbs found Saturday in a swampy area are Jackson's. Authorities continued to search for more body parts and evidence Monday at an undisclosed area.
FBI agents helped local police with the search, which was complicated by persistent rain over the weekend. The rain held off Monday despite cloudy skies.
A suspect, Joel D. Yockey, 46, of Wooster, was arrested Friday night on a parole violation, Maurer said. Yockey had not been charged in Kristen's disappearance or death and authorities refused to say why he was a suspect.
Wayne County Prosecutor Martin Frantz said it was "too soon to tell" whether criminal charges will be filed against Yockey.
Yockey was released from prison in March after serving 15 years of a 10- to 25-year sentence for the 1986 kidnap-rape of a 17-year-old Wayne County girl.
Police said they discovered the remains while searching an area they had reason to believe Yockey would have visited.
Prisons spokeswoman Andrea Dean said Yockey was suspected of violating a parole condition that barred him from associating with anyone under age 18.
She would not specify if Yockey was suspected of associating with Kristen or how authorities became aware of the alleged violation.
Since his release, he had lived with his parents, next to a house where Kristen occasionally visited a friend. His parents would not comment.
He was required to report his address to the sheriff as a "sexually oriented offender" -- a person convicted of at least one sexual offense -- and was listed on the Sheriff's Department Web site as such.
Such offenders are required to register their address for 10 years after their release from prison. But officials are not required to notify neighbors, as they do in more serious cases, where offenders are classified as "sexual predators" or "habitual sex offenders."
"The public should know more about someone who had a rape charge," said resident Chris Schultz, 31. "This guy could have been living next to me. It could have been one of my daughters."
Jennifer Kiko, 28, standing on her porch with her 2-month-old daughter, Tess, said Monday that she always felt safe in the Wooster area but now, "I'm really paranoid."
"You don't think of that kind of thing happening here. You hear about it on the news in other places," said Kiko, who lives about 5 miles west of Wooster located about 50 miles southwest of Cleveland.
A memorial will be held for Jackson this Saturday, September 21 at 10 a.m. in the McGaw Chapel on the Wooster College Campus.