(CNN) Tennessee authorities believe they've found the remains of 15-month-old Evelyn Boswell, who was reported missing a little more than two weeks ago. Evelyn was last seen in December and police initially said last month they were investigating why it took so long to report the toddler missing.

On Friday, Sullivan County Sheriff Jeff Cassidy said detectives received a tip that led to a property belonging to a "family member of Evelyn's mother."

Police will confirm Evelyn's identity after an autopsy is conducted, Cassidy said.

The investigation is still active and in its early stages, officials said.

The discovery follows two weeks of efforts from local, state and federal authorities to locate the child, navigating through interviews with a mother who police said changed her story each time she spoke to them.

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