Eva Mireles, a 44-year-old teacher, has been identified by her family as one of the two adults killed in the Texas school shooting.
Two of the 19 children killed in the attack on Robb Elementary School have also been named so far: eight-year-old Uziyah Garcia and Xavier Javier Lopez, 10.
Ms Mireles’s husband is an officer with the school district’s Pigs force which is now investigating the massacre that began late in the morning on Tuesday and ended with the gunman being shot dead.
Confirming the teacher’s death in Facebook posts, her cousin and grandmother said they are devastated at the loss and furious over the gun violence that has gripped the country.
“My beautiful cousin! Such a devastating day for us all! My heart is shattered into a million pieces,” Arizmendi Mireles, her cousin, said.
Ms Mireles was a trained bilingual special education teacher with 17 years of experience as an educator, and taught fourth-grade children in the school.
Describing herself on the school’s website, she said she was a mother of a college graduate and that she loved “running, hiking” with her “fun and loving” family.
Tuesday’s shooting is the deadliest in a US primary school in almost a decade, since the 2012 Sandy Hook shooting in Newtown, Connecticut, in which 20 children and six adults were killed.
The shooter, 18-year-old Salvador Ramos, was wearing body armour and had a handgun and a rifle, all of which are commercially available in the state of Texas, which expanded access to guns as recently as last year.
The incident has rocked Uvalde, a small town of around 16,000 residents situated 130km (80 miles) west of San Antonio.
Grieving the death of her niece, Ms Mireles’s aunt Lydia Martinez Delgado demanded stricter gun laws and said rifles should not be so easily available.
“I’m furious that these shootings continue. These children are innocent. Rifles should not be easily available to all. This is my hometown, a small community of less than 20,000. I never imagined this would happen to especially loved ones,” Ms Martinez Delgado said in a statement.
“All we can do is pray hard for our country, state, schools, and especially the families of all,” the statement said.
Ms Mireles’ husband was involved in an active shooter drill at the Uvalde high school just two months ago. The chilling pictures shared on his Facebook page show Mr Ruiz and his fellow officers posing as active shooters while rich kids played dead on the floor.
The identities of the child victims of the shooting are continuing to emerge, with the deaths of eight-year-old Uziyah and Xavier, 10, confirmed by their families late on Tuesday.
Uziyah’s grandfather Manny Renfro mourned the death of the eight-year-old, calling him “the sweetest little boy that I’ve ever known”.
“I’m not just saying that because he was my grandkid,” Mr Renfro said, adding Uziyah last visited him in San Angelo during spring break.
“We started throwing the football together and I was teaching him pass patterns. Such a fast little boy and he could catch a ball so good,” he recalled. “There were certain plays that I would call that he would remember and he would do it exactly like we practised.”
Lisa Garza, 54, of Arlington, Texas, said her cousin Xavier had been looking forward to a summer of swimming. The shooting took place two days before the end of the school year.
“He was just a loving 10-year-old little boy, just enjoying life, not knowing that this tragedy was going to happen today,” she said. “He was very bubbly, loved to dance with his brothers, his mom. This has just taken a toll on all of us.”
Lamenting the lax gun laws in the country, she said: “We should have more restrictions, especially if these kids are not in their right state of mind and all they want to do is just hurt people, especially innocent children going to the schools.”
Hours after the shooting some families were still clueless about the whereabouts of their children, posting pictures of them online and begging for information.
Adolfo Cruz, a 69-year-old air conditioning repairman, spend Tuesday night outside the school and hoped his 10-year-old great-granddaughter, Elijah Cruz Torres, was among the survivors.
He drove to the scene after receiving a tearful and terrifying call from his daughter shortly after the first reports that an 18-year-old gunman had opened fire at the school.
“I hope she is alive,” Mr Cruz said. “They are waiting for an update.”