Boswell was last seen in December 2019, but she was not reported missing until February.
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WJHL reports TBI and detectives with the Sullivan County Sheriff's Office searched a property belonging to a family member of Evelyn's mother, Megan Boswell, in the 500 block of Muddy Creek Road in Blountville.
Authorities said there they found the possible remains of the 15-month old.
WATCH: Tenn. Bureau of Investigation gives briefing after remains believed to be Evelyn Boswell found
Tenn. Bureau of Investigation gives briefing after remains believed to be Evelyn Boswell found
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"At this time, the investigation is still in the very early stages," Sullivan County Sheriff Jeff Cassidy said during a news conference Friday night. "There is a lot of work left to be done."
The TBI said an autopsy is pending and the investigation remains ongoing.
In late Feb., investigators searched a mobile home park in Sullivan County, Tennesee in connection with her disappearance.
A few days before, authorities searched a pond in Wilkesboro, N.C. that proved "inconclusive."