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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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
Bidens to visit Texas in 'upcoming days' to meet with victims' families
President Joe Biden and first lady Jill Biden will be traveling to Texas in the "upcoming days," the president said Wednesday.
The two plan to meet with the victims' families "and let them know that we have a sense, just a sense of their pain. And hopefully bring some little comfort to the community in shock and grief and in trauma," the president said during an address Wednesday afternoon.
The president said he was "sick and tired" of the "carnage" that is happening in the U.S.
"The idea that an 18-year-old can walk into a store and buy weapons of war, designed and marketed to kill, is I think just wrong. Just violates common sense," he said. "Where's the backbone, where's the courage to stand up to a very powerful lobby?"
Accused shooter purchased guns at local store: Sources
The accused gunman in Tuesday's deadly school shooting purchased two AR-15-style rifles at Oasis Outback, a federally licensed store located in Uvalde, law enforcement sources told ABC News.
A general manager at Oasis Outback told ABC News that he is working with law enforcement but would not comment on whether the alleged shooter did or did not purchase his guns there.
Oasis Outback is located approximately 3 miles from Robb Elementary School.
According to the Bureau of Alcohol, Tobacco, Firearms and Explosives, the alleged shooter made his gun purchases on two separate days: May 17 and May 20. That means he bought the first AR-15-style rifle one day after he turned 18 and the second four days before the shooting.
Both weapons were purchased at that same store, Steve McCraw, the director of the Texas Department of Public Safety, confirmed during a press conference Wednesday afternoon.
The guns were purchased legally.
-ABC News' Josh Margolin, Aaron Katersky, Laura Romero and Olivia Rubin
Rep. Hoyer to bring 'red flag' bill to House floor next month
The House will move on a bill to create a national red flag law, according to House Majority Leader Steny Hoyer, D-Maryland.
The bill would allow family members or law enforcement officers to "petition for an extreme risk protection order with respect to an individual who poses a risk to themselves or others."
The bill is sponsored by Rep. Lucy McBath, D-Ga., whose 17-year-old son Jordan Davis was fatally shot in 2012.
Hoyer said on Twitter Wednesday that he plans to bring the bill to the floor when the House returns from recess next month.
-ABC News' Lalee Ibssa
Several 911 calls were made from inside classroom as police waited outside
Those inside a classroom with the shooter made several calls to 911, but the tactical unit that arrived at 12:15 p.m. waited 35 minutes before breaching the classroom, Steven McCraw, director of Texas Department of Public Safety, said at a press conference Friday.
A 911 call was made at 12:03 p.m. from room 112 and lasted 23 seconds. McCraw did not identify the caller.
She called back at 12:10 p.m. and advised that there were multiple dead in the classroom, McCraw said.
The person then called again at 12:13 p.m. and again at 12:16 p.m., when said there were eight to nine students who were still alive, McCraw said.
A call was made by someone else from room 111 at 12:19 p.m., the caller hung up when another student told her to hang up, McCraw said.
At 12:21 p.m., three shots were heard over a 911 call. At 12:36 p.m., another 911 call was made by the initial caller and it lasted for 21 seconds. The student caller was told to stay on the line and be very quiet. She told 911 that the gunman shot the door, McCraw said.
At approximately 12:43 p.m. and 12:47 p.m., she asked 911 to please send the police now, McCraw said.
The caller said she could hear police next door at 12:46 p.m. At 12:50 p.m., the Border Patrol tactical unit finally breached the door and shot the suspect.