Eva Mireles, 44, an educator for 17 years, taught fourth graders at Robb Elementary School, according to her aunt, Lydia Martinez Delgado, who confirmed her niece was among those slain. Delgado said her nephew, Ruben Ruiz, was a police officer with the Uvalde school district and was married to Mireles. The couple shared a daughter who recently graduated from college, Delgado said.