‘Time is the number-one enemy’: Did police in Uvalde ignore their own training? Friday, May 27 by ABC News(UVALDE, Texas) -- Two months before Tuesday's mass shooting in Uvalde, Texas, that left 19 children and two adults dead, the Uvalde school district hosted an all-day training session for local police and other school-based law enforcement officers focused on "active shooter response.""First responders... Read More.