He resigned after the incident
exert from a news article-
Ruben Ruiz was among the first police officers to arrive at the scene on May 24. He caught scrutiny and criticism after he was seen on security footage checking his phone. He was trying to connect with his wife, Eva Mireles, who later got through to him and said she had been shot and was dying in room 112. Bodycam video showed other officers restraining Ruiz as he pleaded to breach the classroom, taking his gun and escorting him away from the building.
Ruiz's plea was among the first indications victims were alive in the classroom with the shooter. Even after restraining Ruiz, other law enforcement waited nearly an hour to barge in the classroom. Mireles reportedly reached an ambulance, but died before reaching the hospital.
An official with UCISD confirmed on Sunday that Ruiz had resigned from the force.