FORT WORTH, Texas -- Mesquite police confirmed that the body found Thursday is that of the teen who was swept away by floodwater during Tuesday's storms.

After making a brief announcement that a body was found Thursday, Mesquite police held a press conference to explain how they found 14-year-old Shaun Hebert.

Mesquite Fire Department spokesman Mark Noble said the body was spotted around 2:45 p.m. Thursday by ground searchers downstream from where the teen disappeared.

Searchers used GPS technology after dogs alerted searchers to a spot Wednesday. They found tree roots had been keeping the body close to the ground in waist deep water, officials said.

More than 100 people combed an area south of a highway overpass Thursday for Hebert.

The teenager disappeared Tuesday afternoon when he was pulled in by fast-moving floodwaters. Another teenager was able to swim to safety, but said his friend was swept away and sucked into a drainage pipe.

“It just takes a couple of inches to wash a car away, so you can imagine what it can do to a person on foot,” Lt. Jeff Miller said.

The chief of the Mesquite Fire Department told NBC 5 on Wednesday night that the rescue effort was a recovery effort. Firefighter David Martin also said workers did not expect to find Hebert alive.

"As long as it has been, our expectations are that it will be a recovery," he said.

Mesquite and Balch Springs emergency service workers conducted on Wednesday a search-and-rescue mission for Hebert south of the Interstate 635 overpass at Bruton Road.

More than a dozen people and a Department of Public Safety helicopter scoured a half-mile section along a creek after storms packing 100 mph winds dumped more than 6 inches of rain on parts of Dallas. Although water had receded some, brush and debris posed difficulties, said Mark Noble, a spokesman for the Mesquite Fire Department.

Rescue crews set up checkpoints every quarter mile and used infrared technology that can detect body heat.

"This is also something that could take quite some time before we are finally able to locate the victim," a rescue worker said.

Hebert's brother, Tristan Boudreux, said Hebert was a good kid who enjoyed playing video games.

Hebert was a freshman at West Mesquite High School, where he played the French horn in the school's band.