Several former Robb Elementary teachers gave harrowing testimonies Thursday about terror, training, and even bravery as they recalled details about the fateful May 24, 2022, mass shooting at their school in Uvalde, Texas, that led to the deaths of 19 students and two of their peers.

Nicole Ogburn, who was a fourth-grade teacher at Robb Elementary at the time, told the court that while she was lying on the ground and hiding in her classroom with her students, one of her students crawled on her back and rubbed her arm, telling her, “It’s going to be OK, Ms. Ogburn.”

Ogburn’s testimony was just one of several accounts prosecutors called upon Thursday in the trial of Adrian Gonzales, a former Uvalde school police officer who is facing 29 counts of child endangerment for what prosecutors are saying was his failure to act and follow his active shooter training. Gonzales, one of the first police officers on the scene that day, has pleaded not guilty.

The teachers on Thursday recalled following their own active shooter training and getting into lockdown as soon as they knew there was a threat on campus. Lynn Deming told the court how brave her fourth-graders were while hiding from the shooter, saying her students are “the strongest, bravest people on this Earth.”