The mother of missing 15-month-old Evelyn Boswell is in jail on a charge of filing a false police report.

The whereabouts of Evelyn, who went missing in December, remain unknown at the time of this writing.

Evelyn's family only filed a missing persons report last week.

What are the details?

Authorities charged 18-year-old Megan Boswell with filing a false police report according to ABC News. She is being held at the Sullivan County Jail on a $25,000 bond.

Megan said that her daughter's grandmother took the child to a campground Mendota, Virginia. Police searched the area, but didn't find the child or her grandmother.

Authorities say that Megan has given conflicting accounts in the investigation as to the disappearance and whereabouts of the child.

Evelyn's grandmother, Angela Boswell, and boyfriend William McCloud were arrested last week in North Carolina on fugitive warrants unrelated to the child's disappearance. Angela was extradited to the Sullivan County Jail on Monday and arraigned Tuesday on a theft charge.

The Tennessee Bureau of Investigations reports that both Angela and McCloud are "believed to have information" on Evelyn's whereabouts.

The Tennessean previously reported that investigators are attempting to determine why the child's family took so long to report her missing.

Bureau of Investigation spokesperson Leslie Earhart announced on Friday that the child was last seen wearing a pink tracksuit, pink shoes, and a pink bow. The child stands 2 feet tall and weighs 28 pounds. She has blonde hair and blue eyes.

Anyone with information on the child's disappearance or whereabouts should call 911 and report and details about the case to 1-800-TBI-FIND.

You can read more on the background of Evelyn's disappearance here.