Personnel from multiple law enforcement agencies gathered inside and outside the school before the gunman was challenged and killed.
McLaughlin said in an interview: "At this point, I don't know what to believe and what not to believe.".
And while he said he trusted the DPS individuals serving his community, he no longer believed the upper management.
CNN reached out to DPS for comment and was referred to District Attorney Christina Mitchell Busbee of the 38th Judicial District for details.
She is the official who ordered an investigation by the Texas Rangers division of DPS, which is ongoing.
He said Arredondo, the school police chief later blamed for inaction , was also there, standing up against a wall.
Uvalde is close to the Mexican border, and he said there are frequent school lockdowns as immigration and other law enforcement operations are carried out. »