ORANGE PARK, Fla. -- The mother of a 7-year-old Florida girl whose body was found in a landfill made a promise on national TV Friday to the unknown killer: "We'll get you."

Diena Thompson, mother of Somer Thompson, appeared red-eyed on all three network television morning shows the day after investigators identified the body they found after sorting through tons of debris at a Georgia landfill.

"We're coming for you. We'll get you, and hopefully justice will be served," she said on ABC's "Good Morning America."

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INTERVIEW: Somer's Mom On Good Morning America
FRIDAY NEWS CONFERENCE: 810 Tips Called In
VIDEO REPORT: Investigators Search For Clues
OTHER PRESS CONFERENCES: Emotional Mom Reacts | ID Confirmed
TRACKING THE KILLER: Techiniques & Tactics Used
RAW INTERVIEWS: Grandparents | Detective
SLIDESHOWS: Mom Attends Vigil | Georgia Landfill

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Somer vanished on her one-mile walk home from school Monday in a heavily populated residential area in the Jacksonville suburb of Orange Park. Searchers combed the area before investigators, following garbage trucks that collected trash Tuesday, spotted her lifeless legs in a landfill about 50 miles away.

In a 10:00am Friday news conference, Press Information Officer Mary Justino said that a total 810 leads were called into the tip line, which remains open 24 hours a day.

Of 810, Justino stated, 231 of them are actively being investigated.

Detectives were on scene of an abandoned home on 1080 Gano Avenue in Orange Park (see map), where they say she was last seen on the sidewalk.

“Since Monday what we have been trying to do is find out who frequents that area, “ Justino said.

"It's crazy to think something like this could happen here," said neighbor Andrew Carlson, 17, as he watched officers in protective white suits go in and out of the empty house and comb through a construction trash bin outside. Construction crews had been working on the house, which was damaged in a fire several months ago, he said.

Investigators have finished talking to all the registered sex offenders living within a 5-mile radius of Somer Thompson's house, though none of them is considered a suspect in the girl's death.

Clay County Sheriff's spokeswoman Mary Justino also said Friday that no witnesses have come forward to say they saw the 7-year-old attacked or abducted.

An autopsy to establish the cause of death is done, but authorities Thursday would not disclose their findings. At a news conference, Clay County Sheriff Rick Beseler would not say if Somer had been sexually assaulted or answer other questions about the condition of the body.

"At no point will we discuss the cause of death, the manner in which she died or any other details regarding what was done to this child," Justino said.

Diena Thompson said she does not know any details of the investigation. She said she hopes the killer gets the death penalty.

"I hate him. I hate him," she said on the CBS "Early Show."

"Every morning when I get up, I just get up thinking it's just all a bad dream, and you come out and you see everything that everybody's brought and you know it's real," she said.

Somer’s family met with local funeral home, Jax Memory Gardens Friday. There has been an outpouring of community support both emotionally and financially.

Part of the meeting with the funeral home was to discuss when, were and whether or not Somer’s funeral will be private. Much of the financial donations from the community is said to help with funeral costs.

Missing child posters featuring Somer's face, with chubby cheeks and thick brown bangs, still plaster nearly every utility pole along the mile-long route from her elementary school to her home.

Authorities say Somer squabbled with another child Monday and then walked ahead of the group of kids and was never seen again.

At an intersection about halfway into her walk, where Somer would have crossed the street and turned right on the road that led straight home, a purple ribbon -- which supporters and family members have been wearing -- was tied to the pole of a stop sign.

On Thursday evening, a steady flow of people -- many of them parents, clutching the hands of young children -- walked down that same road toward Somer's house to support her grieving family with a candlelight vigil.

Around a tree across the street from the girl's house, supporters had created a memorial, leaving hundreds of stuffed animals, flickering candles, signs and balloons.

Diena Thompson came out with purple ribbons tied in her hair to thank the group who sang "Amazing Grace" and "You Are My Sunshine," then recited the Lord's Prayer.

"I wish I could hug every one of you," Thompson said. "I love every one of you."

Cries of support came from the crowd of about 200: "The community is behind you!" and "We're here for you. You're in our prayers."

The sheriff said the quick discovery of Somer's body, two days after she disappeared, may have saved precious evidence that could lead to her killer.

"Had we not done this tactic, I believe that body would have been buried beneath hundreds of tons of debris, probably would have gone undiscovered forever," Beseler said.

The girl disappeared in a heavily populated residential area about a mile from a stretch of fast-food restaurants and other businesses. Investigators will presumably try to pinpoint the trash bin or garbage can where she was dumped, based on the trash around her and the truck's pickup route.

"I fear for our community until we bring this person in. This is a heinous crime that's been committed," Beseler said. "And we're going to work as hard as we can to make this community safe."

Another news conference is scheduled at 4:00pm Friday.