As names of some of the victims emerged in the deadly stage-surge horror at the Astroworld Festival concert in Houston, the medical examiner asked for the public's help in identifying one young man died in the chaos that erupted during rapper Travis Scott's performance.
The Harris County Institute of Forensic Sciences released a post-mortem photo of the 6-foot-2, nearly 500-pound man, who perished at Memorial Hermann Hospital in the Texas Medical Center, where he was brought after Friday night's mayhem.
He was among eight concert-goers killed when throngs in the estimated crowd of 50,000 packed into NRG Stadium, home of the Houston Texans NFL football team, suddenly surged toward the stage, authorities said. Another 25 people were injured, one just 10 years old, officials said.
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Flowers are seen outside of the canceled Astroworld festival at NRG Park, Nov. 6, 2021 in Houston, Texas.
The unidentified victim is believed to be in his early 20s, according to the medical examiner's office statement. He had short black or dark brown wavy hair, a slight mustache and a goatee.
A photo of one of the man's size 11 white Nike sneakers was also released.
The medical examiner did not release the cause of the man's death.
Three of the people killed were identified by either their families or the schools they attended.
Houston Chronicle via AP
The crowd watches as Travis Scott performs at Astroworld Festival, Nov. 5, 2021, in Houston.
The youngest victim who died was 14-year-old John Hilgert, a freshman at Memorial High School in Houston, according to a letter the school's principal sent to parents.
"Our hearts go out to the student's family and to his friends and our staff at Memorial," principal Lisa Weir wrote in the letter. "This is a terrible loss, and the entire MHS family is grieving today."
Also killed was 16-year-old Brianna Rodriguez, a junior at Heights High School in Houston, her aunt, Iris Rodriguez, told ABC News.
Iris Rodriguez said her niece had a passion for dance.
"Now she’s dancing her way to heaven’s pearly gates," the Rodriguez family wrote on a GoFundMe page that included a series of photos of Brianna.
Franco Patino, 21, a senior at the University of Dayton in Ohio, was identified by the school as one of the concert-goers killed.
In a letter addressed to members of the university's campus community, the school's president, Eric Spina, said Patino was from Naperville, Illinois, and was majoring in mechanical engineering technology with a minor in human movement biomechanics.
Patino was also a member of Alpha Psi Lambda, a Hispanic-interest fraternity, and the Society of Hispanic Professional Engineers, Spina wrote. Patino had been working in an engineering coop program in Mason, Ohio, according to Spina.
The concert bedlam unfolded around 9:30 p.m. local time Friday when the "the crowd began to compress toward the front of the stage," Houston Fire Chief Sam Pena told reporters during a news conference Friday night.
"That caused some panic, and it started causing some injuries," Pena said.
At least 13 people injured remain hospitalized, including five under the age of 18, Houston Mayor Sylvester Turner told reporters during a briefing.
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"As soon as the crowd began to surge ... those people began to be trapped, essentially up at the front, and they began to be trampled and they actually had people falling down and passing out," Pena said Saturday on ABC's "Good Morning America."
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Houston Fire Department Chief Samuel Pe？±a speaks at the press conference addressing the cancellation of the Astroworld festival at the Wyndham Hotel family reunification center, Nov. 6, 2021, in Houston, Texas.
What triggered the surge is under investigation by the Houston Police Department. Texas Gov. Greg Abbott said he has ordered the Texas Department of Public Safety to make state resources available to support the investigation.
Prior to the fatal surge, some 300 people had been treated throughout the day at the music festival by on-site medical personnel, authorities said. There were "many instances" where they had to administer Narcan, which is used to treat a narcotic overdose, said Pena, who did not have an exact number.
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Houston Police Chief Troy Finner said that during the pandemonium, a private security guard working at the festival was possibly injected in the neck with drugs as he was attempting to grab or restrain someone.
"When he was examined, he went unconscious," Finner said during a Saturday afternoon briefing. "(Medical staff) administered Narcan. He was revived, and the medical staff did notice a prick that was similar to a prick that you would get if someone was trying to inject."
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Finner went on to caution people posting theories on social media against the speculation about the cause of the incident.
"A lot of narratives are out there right now on social media," Finner said. "I think that all of us need to be respectful of the families and make sure we follow the facts and the evidence."
ABC News' Meredith Deliso, Jenna Harrison, Kendall Coughlin and Darren Reynolds contributed to this report.