Updated June 23: Revised with details from news conference held by Bedford police.

Bedford police said they're leaving "no stone unturned" in their criminal investigation after a missing teen was found dead in a landfill.

Chief Jeff Gibson also insisted Friday that his department did everything it could in the time between when 14-year-old Kaytlynn Cargill was reported missing and when her body was found at the Arlington dump.

"Our employees performed exceptionally well," he said at a news conference at Bedford police headquarters. "There is nothing we could've done differently."

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Kaytlynn's body was found Wednesday afternoon, two days after she disappeared Monday evening while walking her dog.

The Tarrant County medical examiner's office identified her Thursday and performed an autopsy, though her cause and manner of death have yet to be released.

Investigators have yet to identify any suspects or persons of interest, Gibson said, but police have no evidence indicating that there's any threat to the public.

Bedford Police Chief Jeff Gibson said Kaytlynn Cargill's disappearance did not merit an Amber Alert before she was found dead in the Arlington landfill Wednesday. (Ron Baselice / Staff Photographer)

"We do not see anything that would indicate a repeat offender," he said, adding that he didn't know whether the girl had been sexually assaulted.

"There's nothing we could have done differently," said Bedford Police Chief Jeff Gibson https://t.co/Mka97Rc8VA pic.twitter.com/i15DpKRsEk — NBC DFW (@NBCDFW) June 23, 2017

Addressing concerns that the department did not issue an Amber Alert, Gibson said he reviewed every action taken by police and was satisfied with their actions, under the circumstances.

"There's specific criteria that law enforcement personnel have to follow in terms of initiating an Amber Alert," and this case, he said, did not meet those criteria since police did not have any evidence that she was abducted or in danger.

Kaytlynn Cargill (Facebook)

Kaytlynn was last seen about 6:20 p.m. Monday near the Oak Creek Apartments in the 1700 block of Oak Creek Lane, about 4 1/2 miles from the landfill.

An employee discovered her body at the Republic Services landfill, in the 800 block of Mosier Valley Road not far from North Collins Street, Arlington police said.

Kaytlynn's parents began looking for her when she did not return home after about 30 minutes. She was reported missing to police about 8 p.m., police said.

Her dog was found tied to a fence at the complex dog park. A friend of Kaytlynn's said the teen asked others to watch the dog for a minute but did not return, according to a flier.

Gibson said her family believed she might have gone off to a friend's house, and police searched several different homes where her family said she might be.

Her family did not answer a call for comment, but her former stepsister Macayla Moore told KDFW-TV (Channel 4) that Kaytlynn had hopes to attend the University of Oklahoma.

"She wanted to be an OU Sooner and play softball there," she said. "It's just heartbreaking that she'll never get that chance now."

1 / 7Tracarria Camper, 13, holds a balloon and candle during a prayer vigil held in honor of Kaytlynn Cargill at Central Junior High School in Euless on Thursday.(Tailyr Irvine / Staff Photographer) 2 / 7Jaedin Gaston, 13, mourns during a prayer vigil held in honor of Kaytlynn Cargill at Central Junior High School in Euless, Texas on June 22, 2017. (Tailyr Irvine / Staff Photographer) 3 / 7Amy Johnson hold balloons for a prayer vigil held in honor of Kaytlynn Cargill at Central Junior High School in Euless, Texas on June 22, 2017. (Tailyr Irvine / Staff Photographer) 4 / 7Lafayette Armstrong hugs his friends during a prayer vigil held in honor of Kaytlynn Cargill at Central Junior High School in Euless, Texas on June 22, 2017.(Tailyr Irvine / Staff Photographer) 5 / 7The wreath placed outside of the landfill where a missing Bedford girls body was found.(Staff writer / Emma Ruby) 6 / 7Bedford Police Chief Jeff Gibson holds a press conference on Kaytlynn Cargill, the 14-year-old girl whose body was found in an Arlington landfill. Cargill went missing Monday evening while walking her dog, and her body was found Wednesday.(Ron Baselice / The Dallas Morning News) 7 / 7Bedford Police Chief Jeff Gibson holds a press conference on Kaytlynn Cargill, the 14-year-old girl whose body was found in an Arlington landfill. Cargill went missing Monday evening while walking her dog, and her body was found Wednesday. (Ron Baselice / The Dallas Morning News)

Bedford police were canvassing the area Wednesday evening, knocking on doors at the apartment complex where she was last seen. Patrols remained in the area Thursday night, Bedford Lt. Kirk Roberts said.

Bedford police initially said the department did not think the 14-year-old was in danger and did not suspect foul play.

A vigil was held Thursday night at Central Junior High School where Kaytlynn was had just completed seventh grade and played trumpet in the band.

"You could look at her and tell she was always really happy, she was really carefree," classmate Bayleigh Wagoner told KXAS-TV (NBC5).

Another mourner, Brooke Kirkland, took balloons to the apartment complex dog park where Kaytlynn was last seen.

"I just don't understand," Kirkland said. "She's just out here walking her dog, doing a normal thing. Then she's just gone."

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The Hurst-Euless-Bedford ISD issued a statement expressing the district "is stunned and deeply saddened to learn of a tragedy affecting our school community."

"In times like these, we pull together as a community and support one another," the written statement said.

A counselor will be available Monday morning at Trinity High School.

Anyone with information in the case is asked to contact Bedford police at 817-952-2440. Anonymous tips may also be submitted to Tarrant County Crime Stoppers at 817-469-8477.

Breaking news reporter Claire Ballor contributed to this report.