It sounds like the 2 boys were being harassed by those officers? The officers sound like they are the ones who pepper sprayed them.
Also asking if 2 "Mexicans" had been there is very racist.
The article does say the boys told the neighbors someone they had tried to fight had peppersprayed them, however what if police broke up the fight by pepperspraying them? Then the boys take off, which was why police were looking for them later. Obviously something the officers knew made them say, "that sounds about right." So i would think that the officers know who peppersprayed them, if they didn't do it themselves.
They need to be looking into the background of the 2 officers and also whoever it was the boys were trying to fight that day..