Texas school shooting: Suspect's grandmother upgraded to good condition
Twenty-one were killed and 17 were injured in last week's mass shooting.
A small town in rural Texas was left reeling after a gunman opened fire at an elementary school, killing 19 children.
Two teachers were also killed in the May 24 shooting at Robb Elementary School in Uvalde, according to authorities.
The alleged gunman -- identified by authorities as 18-year-old Salvador Ramos, a student at Uvalde High School -- was killed by law enforcement at the scene.
The suspect allegedly shot and injured his grandmother before opening fire at the school, officials said.
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March for Our Lives event planned for June 11 in DC
March for Our Lives, a student-led movement in support of gun control legislation that formed in response to a 2018 school shooting, is planning a march in the nation's capital in the wake of the mass shooting at Robb Elementary School.
"In 2018 you marched with us to end gun violence. 4 years later, we're marching again," the organization said on Twitter Wednesday evening, announcing a march in D.C. on June 11.
The organization held a march following a shooting at Marjory Stoneman Douglas High School in Parkland, Florida, in 2018 that killed 17 people.
Gunman likely killed by Customs and Border Protection SWAT team member
Authorities believe the Uvalde school shooter was shot and killed by a member of the Customs and Border Protection's tactical unit, known as BORTAC, CBP Del Rio Sector Chief Jason Owens told ABC News.
Owens, who did not identify the agent, said his actions "were absolutely courageous," but added it wouldn't be fair to single anyone out.
"It would be unfair to say that any one person's actions were singularly responsible for ending that threat," Owens said. "It took everybody."
-ABC News' Josh Margolin and Mireya Villarreal
Gunman shot and killed within hour of entering school, authorities say
As law enforcement officials continue to scrutinize each movement made by alleged gunman Salvador Ramos inside Robb Elementary School, Texas Department of Public Safety Director Steven McCraw said that law enforcement officers shot and killed the suspect roughly 40 minutes to an hour after his first encounter with the school district's resource officer at the building entrance.
"I don’t want to give you a particular timeline. But the bottom line is that law enforcement was there," McCraw told reporters during a briefing Wednesday. "They did engage immediately. They did contain him in the classroom, and they put a tactical stack together in a very orderly way and of course breached.”
McCraw later said that investigators plan to go frame-by-frame through surveillance footage to "track every minute" of the gunman's movement and will provide an update once that work is completed.
-ABC News' Lucien Bruggeman
Suspected shooter not wearing body armor
The suspected Robb Elementary School shooter was not wearing body armor during Tuesday's massacre, multiple law enforcement officials told ABC News.
The alleged gunman was wearing tactical gear, including a vest that could hold ammunition, but there was no armor or fabric that would protect him from gunfire, the sources said.
-ABC News' Matt Gutman, Josh Margolin and Aaron Katersky
State senator: 'Every day is 1 day closer to students dying'
Texas state Sen. Roland Gutierrez is counting down the days until the start of the next school year, which he said is 77 days.
Without change, "every day is one day closer to students dying," Gutierrez, a Democrat, told ABC News.
He is among the lawmakers calling on Texas Gov. Greg Abbott to convene a special session to address gun violence.
The senator also mentioned potential plans to tear down Robb Elementary and build a new campus.
"I want what families want. Every person has told me they don’t want to go back. Little kids I’ve met have told me they don’t want to go in that school," he said.
-ABC News' Marcus Moore and Darrell Calhoun