Texas school shooting: Suspect's grandmother upgraded to good condition

Texas Gov. Greg Abbott said he was "misled" about the response to the Uvalde school shooting.

"I am livid about what happened," Abbott said during a press briefing Friday, hours after the Texas Department of Public Safety detailed missteps that led to a 35-minute wait to breach the classroom where the shooter was.

"As everybody has learned, the information that I was given turned out, in part, to be inaccurate, and I'm absolutely livid about that," Abbott said Friday. "There are people who deserve answers the most, and those are the families whose lives have been destroyed. They need answers that are accurate, and it is inexcusable that they may suffer from any inaccurate information whatsoever."

The governor said there will be investigations into the release of information on the shooting and the strategy employed in the response.

On Wednesday, Abbott said an officer had confronted the shooter at the entrance to the school building, which was not the case.

"But the reality is, as horrible as what happened, it could have been worse," he also said at the time. "The reason it was not worse, is because law enforcement officials did what they do."

The gunman had purchased a total of 1,657 rounds of ammunition, 315 of which were inside the school, Steven McCraw, director of Texas Department of Public Safety, said Friday.

McCraw said 142 of those rounds were spent cartridges and 173 were live rounds.

Officials found 922 rounds outside of the school, but on school property. Of those rounds, 22 were spent cartridges and 900 were live rounds. Another 422 live rounds were found at the crash site, McCraw said.

The suspect had a total of 60 30-round magazines, 58 of which were at the school. He had fired nearly 200 rounds, most of them inside the school, said McCraw.

Five of the 17 people injured in the elementary school shooting remain in the hospital on Friday, according to officials.

Two children and one adult are being treated at University Hospital in San Antonio, two of whom are in serious condition, and two adults are at Brooke Army Medical Center, both in fair condition.

A 10-year-old girl was discharged from University Health in San Antonio.

Eight children and three adults were treated and discharged from Udalve Medical Center earlier this week.

-ABC News' Jennifer Watts

As part of its ongoing investigation into Tuesday's shooting, the Texas Department of Public Safety is conducting a review of law enforcement actions.

This comes after the visibly shaken Steven McCraw, the director of the Texas Department of Public Safety, revealed a cascading series of police failures before and during one of the deadliest school shootings in the nation’s history.

The incident commander, the chief of Uvalde ISD Police, wrongly believed the incident had transitioned from an active shooter situation to a barricaded subject situation, where the suspect had stopped firing and barricaded himself in a classroom, no longer posing a threat to children, McCraw said.

“He thought there was time,” McCraw said.

McCraw said there may have been a belief by the incident commander that no one was alive anymore inside the classrooms. But, he detailed multiple 911 calls made from inside the classrooms, on which callers explicitly said several children were alive and trapped inside with the shooter. Callers at several points asked for police to be sent in.

-ABC News' Aaron Katersky