Editor’s note: This story contains reporting that some readers may find disturbing.

Uvalde Justice of the Peace Eulalio “Lalo” Diaz can’t silence the question haunting him since a gunman at Robb Elementary School walked into a fourth grade classroom and opened fire.

Diaz, who helped identify victims of the May 24 attack, wonders whether a faster police response, rather than the 77-minute delay, might have saved any of the 19 children and two teachers.