The Tarrant County Medical Examiner has confirmed a body found in an Arlington landfill is 14-year-old Kaytlynn Cargill, who was reported missing Monday night.

In a Facebook post, the Bedford Police Department announced earlier this week that Cargill disappeared while walking her dog near the Oak Creek Apartments.

A body was discovered Wednesday afternoon by a worker at the landfill about five miles from Cargill's house. The medical examiner confirmed it was the young girl but hasn't yet ruled on a cause of death.

Police said in a brief statement late Thursday they are working the girl's case hard.

"We will pursue every lead, leave no stone unturned and bring the person or persons responsible for Kaytlynn's death to justice," said Lt. Kirk Roberts

During their search for the teen, police canvassed the teen's neighborhood and flyers were posted around the town. According to the flyers, a friend said she saw Kaytlynn tie her dog's leash to a fence and asked friends to watch the dog but never returned.

"I didn’t hear any yells, and it happened right behind my balcony," said neighbor Zach McDaniel. "I heard no yells, no helps, no nothing."

Initially, police said there was no reason to suspect foul play in the disappearance. There also was no issuance of an Amber Alert, although very strict conditions must exist for that to happen, according to state law.

Thursday night, more than 100 friends and classmates gathered at Central Junior High, where she was a seventh grader. Friends say she was a vibrant young teen that loved band.

A GoFundMe has been set up for the family.

Authorities have asked anyone with information pertaining to the death of Cargill to call the Bedford Police Department at 817-952-2440 or contact the Tarrant County Crime Stoppers at 817-469-TIPS.

Police said they were increasing patrols in and around the girl's Oak Creek Apartments.

WFAA.com's Marjorie Owens contributed to this report