"We believe she travelled to Ngāruawāhia on January 12, 2018," he said.
"We are very interested in finding out how she travelled there and her movements during 12 to 26 January 2018."
"We are also very keen to hear from anyone who saw Leonie in the Ngāruawāhia area or knows anything about her disappearance."
Hunkin said it may be that Emery has left Ngāruawāhia and he called on anyone who knew her whereabouts to get in touch.
"Police are keeping an open mind as to the circumstances surrounding Leonie's disappearance and this is still being treated as a missing persons case," he said.
"Leonie moved around regularly, which is why her family did not immediately have concerns for her safety."
He said police are determined to find out what has happened to Emery to provide her family with some form of closure.
Anyone with information can report this via the 105 phone line, quoting file number 190222/9022 or by contacting Crimestoppers anonymously on 0800 555 111.