Police said they believe there were at least three shooters: a 15-year-old, an acquaintance who died at the scene and "at least one other unknown suspect."
The shooting has outraged Houston leaders and renewed public scrutiny over ICE and President Trump's immigration crackdown.
Community activists and members gathered under sweltering heat to express their growing frustration and calls for accountability in the shooting death of Lorenzo Salgado Araujo.
Lawyers for the man accused of killing conservative activist Charlie Kirk are trying to sow doubt about the case.
The man fatally shot during a traffic stop by an Immigration and Customs Enforcement officer in Houston this week was not the original target of the immigration enforcement operation, a Department of Homeland Security official told ABC News.
In the days following the shooting, Lorenzo Salgado Araujo's family has called for an independent investigation into the case and said they have not heard anything from the Department of Homeland Security or ICE.