Editor's note: Some of the testimony described below is extremely graphic.
The families of some of theRobb Elementary Schoolmass shooting victims passed around tissues before graphic photos were shown in court on Friday at the trial of formerUvalde, Texas, school police officerAdrian Gonzales.
Gonzales -- who was one of nearly 400 law enforcement officers to respond to Robb -- is charged with child endangerment for allegedly ignoring his training during the botched police response. Nineteen students and two teachers were killed, and investigations have faulted the police response and suggested that a 77-minute delay in police mounting a counterassault could have contributed to the carnage.
Gonzales has pleaded not guilty and his legal team says he did all he could to help students.
Former Uvalde educator recounts asking 911, 'Where are the cops?' in emotional testimony
Judge Sid Harle issued a warning to the gallery before the jury entered on Friday.
"I want to forewarn you, these photographs are going to be shocking and gruesome, and if anybody wants to step out, you are welcome to step out, but we cannot have any displays in front of the jury," Harle said. "I'm forewarning you -- these are not going to be pleasant to look at, and I'm sorry you're going to have to look at them just like I had to."
Former Texas Ranger Juan Torrez took the stand and described in detail the crime scene photos he took inside Room 111 at Robb,where all 11 students were killed on May 24, 2022. Theteacher was the sole survivor.
"There was a lot of shell casings," said Torrez, who spent three days photographing the room. "There's a lot of blood, a lot of blood swipes, and the weapon was in the closet."
Uvalde in Their Own Words: Teacher whose students were killed shares physical, emotional scars
Using a pointer to highlight parts of the photos, Torrez testified about the location of the classroom, damage to the door and areas of the room where students didn't attempt to hide. Defense lawyers had objected to showing the more graphic images, but Harle allowed the bulk of them into evidence due to their relevance to the prosecution's case.
"Does the scene change?" prosector Bill Turner asked Torrez about some of the photos.
"As far as the presence of blood, it changes dramatically," Torrez said. "A lot of bullet holes, a lot of shell casings covered in blood, a lot of bullet defects, perforations, penetrations, and just a lot of blood."
Over the next hour, the courtroom fell almost entirely silent, other than the testimony and occasional ruffling of tissues and sniffling. Some of the jurors craned their necks to see the photos, while others covered their mouths or lifted tissues to wipe their eyes. The families of the victims sat quietly and no one left the courtroom during the testimony.
Uvalde officer was told location of gunman but he failed to act, prosecutors say
The photos did not show the bodies of students, which were removed prior to the photos being taken. But jurors did see photos showing large pools of blood and the drag marks made when the bodies were removed. Photos also showed dried bloodstains on desks, textbooks and office supplies.
Torrez testified that investigators placed rods in the cavities left by the bullets to demonstrate the direction of the gunshots. The pink and yellow rods showed that the shooter likely fired downward -- through the desks -- toward the sheltering students, Torrez said.
Torrez offered his testimony with little context other than his experience as a crime-scene photographer that day. Prosecutors did not explain how the images relate to Gonzales, other than suggesting that his alleged inaction contributed to the loss of life that day.
Defense attorneys say Gonzales is being scapegoated for a broader failure by law enforcement. In itsopening statement this week, the defense alleged that prosecutors were playing on jurors' emotions and that convicting Gonzales would be an injustice piled on top of one of the worst school shootings in U.S. history.
ABC News' Juan Renteria contributed to this report.
