Mateo Zastro’s mother calls on assailants to surrender. ‘Turn yourselves in because my pain is starting to turn to anger.’

Balloons with messages to Mateo Zastro are released at a prayer vigil Monday evening. The 3-year-old was riding in his mother’s SUV on Friday when someone in another car fired shots, killing him. (Tyler Pasciak LaRiviere/Sun-Times)

The mother of 3-year-old Mateo Zastro, fatally shot in what police say was a road-rage attack, made an emotional plea at a prayer vigil Monday night, asking those responsible to turn themselves in.

“I want you to turn yourselves in so my baby can cross over,” Veronica Zastro said through tears. “It wasn’t necessary to do what you did. Turn yourselves in because my pain is starting to turn to anger.”