Harris County Sheriff's Office released a statement overnight explaining the method with which they came to their conclusion - which also states that Eric Black confessed to taking part in Jazmine Barnes' killing, shortly after he was taken into custody without incident. He faces a charge of capital murder.
The prosecutor said the anonymous source who tipped off the police identified Larry W.by name and described him as a black male.
Court records did not list an attorney for Black, who was arrested on Saturday afternoon during a traffic stop.
According to a report from ABC13, citing court documents filed in the case, the suspects thought it was another vehicle when they opened fire last week on the auto leaving a Houston-area Walmart parking lot. A second person, now in jail on drug charges, is also listed as a suspect in the shooting.
Rep. Sheila Jackson Lee, a black Democrat who represents parts of Houston, said there was nothing irresponsible about the early suggestions it was a hate crime.
Sheriff Gonzalez says investigators believe there are two individuals, including Black, involved in the case, and investigators are working to verify information.
Black confessed to homicide investigators that he drove the vehicle used in the shooting when a man in the passenger seat opened fire, according to the affidavit.
Jazmine's father, Christopher Cevilla, also thanked people for their support, and before Black's capture, he pleaded for the public's assistance in finding his daughter's killer.
Jazmine Barnes was riding in a auto with her mother and sisters on December 30 when someone in another vehicle shot her in the head. The other two girls in the vehicle were not harmed.
During the rally, people held up balloons and stuffed animals, as well as signs that said "Justice for Jazmine".
Prosecutors said he admitted driving the auto while an accomplice opened fire in what may be a case of mistaken identity. Available reporting suggests that a second man is being identified as the actual shooter.
Campaigners had feared the shooting, on an African-American family, may have been racially motivated.
Before Black's arrest, police released a sketch of the suspect described as a white man in his 40s, based on information from Jazmine's mother and three sisters.
The suspects "were complete strangers to this family", Merritt said.
Officials said investigators are also looking into the possibility that others could be charged in the case.
"It touched me deeply", Miles said. Houston Texans star wide receiver DeAndre Hopkins said he would pledge his playoff check to help the family and the effort to find the suspect. Her funeral is at noon.
"It wasn't about race for me", said one resident, Tammetta Mares, a 41-year-old teacher's aide who is black and has three children, including a 7-year-old girl.