"We do not (have) any other details at this time as this is a very fluid and active investigation", Barron County Sheriff Chris Fitzgerald posted on Facebook.
'We also want to thank all the Law Enforcement agencies across the state and county that have assisted us in this case.
Authorities announced Thursday evening that 13-year-old Jayme Closs was found in the Douglas County town of Gordon, Wis., about an hour north of her Barron, Wis., hometown.
A 911 call was made from Denise Closs' cellphone at about 1 a.m. on October 15, with garbled, inaudible audio. "We do believe Jayme was home at the time the call was made".
Last month, the sheriff's department remained vigilant that Jayme would be found. Sheriff Scott Fitzgerald continued to urge the public to come forward with tips and to keep the story in front of people for as long as possible.
'Finally, we want to especially thank the family for their support and patience while this case was ongoing. "From the bottom of my heart THANK YOU!"
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The packages were sent two days after an envelope containing powder was sent to the Argentinian consulate in Sydney . A worker at the Pakistani consulate in Melbourne opened one of the packages about 10am on Wednesday.
Detectives have pursued thousands of tips, watched dozens of surveillance videos and spent countless hours searching for Closs since her October 15 disappearance.
When police arrived they saw the door was kicked in and found Jayme's parents, 56-year-old James and 46-year-old Denise, dead inside with gunshot wounds.
Robert Naiberg said that nothing seemed amiss at the gathering, and that Jayme was "quiet as always".
Both Jayme and Denise have been described as quiet, kind, religious and giving, an example of how a loving mom raised her daughter with her own good values. However, Barron County officials cleared him of any involvement in the teen's disappearance. "It's the news we've been waiting on for three months".
There were days when it was hard to hold onto hope, he said.
A person of interest was also taken into custody by police, authorities said, but it was not immediately clear if the suspect was wanted for the killing of Closs' parents or her kidnapping.