Authorities pushed back Tuesday against claims made by the mother of a missing Tennessee toddler, who said her daughter was at a campsite in southern Virginia and complained that law enforcement was not taking the case seriously.

Megan "Maggie" Boswell, in a televised interview with WJHL, said she alerted the Tennessee Bureau of Investigation that 15-month-old Evelyn Boswell was in Mendota, an unincorporated area about 20 miles northeast of Bristol, Tennessee.

THE LATEST: Authorities searching N.C. pond in Evelyn Boswell case

UPDATE:Evelyn Boswell's mother arrested in Sullivan County

"The claim that Megan made stating that Evelyn was in a camper in Mendota was investigated completely," Sullivan County Sheriff's Office Capt. Andy Seabolt said.

"The Washington County Virginia Sheriff’s Office along with the United States Marshals checked every campground in Mendota and nothing was found," Seabolt told USA TODAY Network newsrooms in Tennessee. "Megan’s story has changed multiple times throughout this investigation."

The TBI issued an Amber Alert on Feb. 19 for Evelyn. Although Evelyn was last seen on Dec. 26, 2019, she was not reported missing until Feb. 18.

That report was made by Evelyn's grandfather, who told the Department of Children's Services that certain family members hadn't seen her in two months. The case was referred to the Sullivan County Sheriff's Office, launching an investigation.

RELATED:If Evelyn Boswell disappeared in December, why did it take months to issue an Amber Alert?

STAY UPDATED:Keep up to date on the search for Evelyn Boswell with alerts delivered to your phone

Megan Boswell, 18, has full custody of the child and lives in Blountville, Tenn. Evelyn's father, 20-year-old Ethan Perry, is on active duty in the military stationed in Louisiana. Both are involved in their daughter's investigation, authorities have said.

Perry's whereabouts were not immediately known on Tuesday.

"I have no knowledge of Ethan Perry’s current location; however, I watched an interview last night that Megan Boswell completed," Seabolt said Tuesday. "During the interview she stated that Ethan was attempting to have leave approved to return home."

Megan Boswell's changing statements

In an initial interview with WCYB News 5, Evelyn's mother said she was afraid to report her missing and that the girl was with a babysitter. She would not identify the sitter.

“The reason I didn’t report it or anything was I knew the person who had her, and I didn’t want them to run away with her,” Boswell told reporters. “And as soon as they thought anything was going on, they just kinda vanished. So I’m just kinda worried, you know, about where they are at. What they’re doing with her."

During that same interview, Boswell claimed she is pregnant.

Soon after, she spoke to WJHL Channel 11 and during the interview said she knew where Evelyn was and had told authorities.

“I told TBI where to find her in Mendota. My mom took her to a campground in a silver camper and if they don’t go tonight, I’m going to go find her myself, because I’ve told them and they’re not really like taking it seriously and if they don’t go tonight, I will go myself and go get her," she told reporters.

"They’re not taking me seriously, TBI isn’t, because I’ve not fully told them. I’ve been like ‘hey, like my mom camped out in Mendota,' you know, to go check them out, but I’ve never been like, ‘hey,’ specifically, ‘hey, she’s like in a silver camper,’ because my mom did threaten me like you know if I told anybody — I’m not gonna get into that — but she did,” Boswell said.

Social Media

Facebook shows Megan Boswell has multiple profiles including one under the name Maggie Wood, which includes a cover photo of Evelyn.

"Here are some more pictures of Evelyn, please share and help me find my baby! She is the sweetest baby you will ever meet and will smile and want to hug you when you see her. Around 2ft tall, 28 lbs, dirty blonde hair and blue eyes!"

Another profile under the name Maggie Boswell reads she graduated from Sullivan Central High School and currently attends Northeast State Community College.

"Happy 4th from me and my beautiful daughter,' she captions in a photo of Evelyn who sits on a pink blanket and dons a red flowered head scarf.

There is a third profile listed under the name Megan Nicole Kys.

A picture dated 2017 shows her kissing Ethan Perry, Evelyn's father.

The search for Evelyn continues

Sullivan County Jeff Cassidy has said Evelyn's case is full of "conflicting information and inaccuracies."

“This is unlike anything I have ever seen,” Cassidy said.

The TBI called the investigation complicated.

EVELYN BOSWELL:Every development in the weeklong search for the East Tennessee toddler

JOURNALISM MATTERS:Subscribe to a local Tennessee publication for the stories that matter to you.

As of Tuesday, no arrests had been made in Evelyn's case but on Friday, William McCloud, 33, and his 42-year-old girlfriend Angela Boswell, the missing girl's grandmother, were arrested in Wilkes County, North Carolina, and charged with possession of stolen property for driving a stolen BMW.

Both were being sought for questioning in Evelyn's disappearance.

Authorities say the pair was traveling in a 2007 BMW, hours after the TBI announced that they were searching for the car, reported stolen.

They both waived extradition during an appearance in a North Carolina courtroom Monday. Angela Boswell told the judge she was anxious to return home to face questioning.

She was transported to jail in Sullivan County where she was being held without bond on Tuesday. McCloud remained jailed in Wilkes County.

Boswell has been described by police as about 2 feet tall and weighing 28 pounds. She was last seen wearing a pink tracksuit, pink shoes and a pink bow.

Authorities have asked anyone with information about Evelyn Boswell to contact the Sullivan County Sheriff’s Office at 423-279-7330 or TBI at 800-TBI-FIND.

A $58,950 reward is being offered for information leading to her whereabouts.

Hayes Hickman contributed to this report. Reach Natalie Neysa Alund at nalund@tennessean.com and follow her on Twitter @nataliealund.