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David Negrete was put on the state's most wanted list soon after Sunday's shooting, where a 10-year-old boy was killed, and a 14-year-old girl was among four other people injured.
Pearland police identified Negrete as one of the suspects Monday, releasing the following images:
Two others, Julianna Espino and Cruz Meza, were arrested in connection with the shooting and face charges of tampering with evidence and lying to police. The 18-year-olds were booked into the Brazoria County Jail.
The shooting happened at Cole's Antique Village and Flea Market in the 10000 block of North Main in Brazoria County shortly after 5:30 p.m. on Sunday.
When officers arrived at the scene, they found five people shot.
All five victims were taken to area hospitals, where the 10-year-old Francisco Duarte was later pronounced dead.
Duarte was a third-grade student at Chambers Elementary School in Alief ISD, according to the district's communications department.
A crisis team has been at the school all week, with counselors available for students and teachers.
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On Monday morning, Pearland police confirmed a 14-year-old girl and a 37-year-old man, who has since been released from the hospital, were among the bystanders injured.
The 14-year-old is expected to survive.
Authorities said a 16-year-old and an 18-year-old, later identified as Meza, were also shot and taken to area hospitals. Police are still working to determine how the 16-year-old was involved in the shooting.
"I can tell you that the 10-year-old, the 14-year-old, and the 37-year-old victims were innocent bystanders caught in the crossfire as a result of the altercation," Pearland Police Officer Chad Rogers said.
ORIGINAL REPORT: 1 dead, 4 injured after disturbance leads to gunfire at Pearland-area market on Sunday, police say
Child dead, 4 injured following gunfire at Pearland area flea-market
Investigators said there was an argument between Negrete and another person that escalated into an exchange of gunfire.
The shooting was a shock to the Pearland community.
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"No, this is not anything that happens in Pearland. It is extremely tragic anytime someone is a victim of gun violence, especially in our community. This does not happen here in Pearland," Rogers said.
Officials confirmed two handguns were used in the shooting, but it's unknown how many shots were fired.
If you have additional information, authorities urge you to contact the Pearland Police Department Tip Line at (281) 997-5828 or Brazoria County Crime Stoppers at 1-800-460-2222.
"A 10-year-old child was killed in a senseless manner, so any support we can get, whether it's financially or the public, is very welcomed in this case," Rogers said.
WATCH: Authorities identify suspected gunman in flea market shooting
10-year-old killed, 4 hurt in shooting at Pearland flea market: Police
SEE PREVIOUS REPORT: Suspect wanted after 10-year-old killed, 4 injured in shootout at Pearland flea market, police sayt