minutes to tick by before police killed the gunman. acting uvalde police chief mariano pargas was one of the first to enter robb element on may 24th. the chief of the uvalde police was on vacation which left pargas in charge of the city police. pargas arrived at 11:36 a.m., just three minutes after the gunman fired his first shots. his officers run in ahead of him and make an attempt to breach the classroom. they quickly retreat when shots are fired in their direction. cnns that chosen to mute the sound of those gunshots. am i bleeding? am i bleeding? reporter: minutes later uvalde police officer ruben ruiz whose wife is a teacher at robb elementary delivers critical information to pargas. the shooter is located inside his wife s classroom.