 Emergency services audio and police communications obtained by the Texas Tribune and ProPublica showed Gonzalez was among the officers made aware by 11.48 a.m. that a teacher had been shot in room 112. Less than 15 minutes after the shooter entered the building, Gonzalez said over the radio that a suspect was in that teacher's classroom. In all, it took 77 minutes from when the 18-year-old shooter walked into Robb Elementary until he was stopped.