An anthropologist from Tennessee was employed to conduct the tests. Although the murder remained unsolved at the time, investigators stated they hoped that the case will eventually come to a close. A press conference in 2013 explained they had uncovered more clues. It was announced on July 19, 2015, that the examination of the remains had been completed and that they would be reburied on the 16th anniversary of Johnson's discovery. Authorities stated they had indeed uncovered new leads from the exhumation, but they declined to state any details. On October 20, 2016, it was announced that chemical isotope testing performed by the Smithsonian on a sample of her hair and bone suggested she was potentially from or spent several years of her life in Alaska, Montana or portions of southern Canada. Authorities did not comment on what testing the results are from, whether recent with hair or history from bone. Additionally, it was revealed the victim or her murderer(s) were possibly from southeastern New England, such as New Hampshire and New Jersey. The police department planned on seeking forensic genetic genealogy organizations to identify potential relatives of the victim. On November 7, 2019, the Racine County Sheriff's Office announced that Sheriff Christopher Schmaling would hold a Media Briefing the following day to release information about Racine County Jane Doe's identity and the name of the individual in custody for her death. The announcement stated that "both the victim and the individual in custody have substantial ties to a northwestern Chicago suburb." On November 8, 2019, Racine County authorities identified the victim, through DNA comparison, as Peggy Lynn Johnson, 23, of McHenry, Illinois. Her accused killer was identified as a 63-year-old nurse, Linda Sue La Roche. La Roche owned her own nursing practice, established in 1997, which provided health care to at least two Illinois correctional facilities, without displaying any questionable or inadequate behavior. Johnson was never reported missing, although an aunt placed a personal ad in a December 1999 issue of "Northwest Herald" requesting Johnson contact her. La Roche was arrested on November 5, 2019, in Cape Coral, Florida, where she resided since 2013. The warrant was listed as $1 million. She reportedly confessed to killing someone during her stay in Illinois to various individuals, one of whom alerted police on September 23, 2019. According to a criminal complaint, La Roche was charged with first-degree intentional homicide and concealment of a corpse. Authorities state the maximum penalty would be life in prison. At the time she was charged with murdering Peggy Johnson, she was facing legal proceedings after causing a vehicle accident while intoxicated.