NEWSPHOTOS: Up to 10 killed in Texas school shootingA woman prays in the grass outside the Alamo Gym where parents wait to reunite with their kids following a shooting at Santa Fe High School Friday, May 18, 2018, in Santa Fe, Texas. (Michael Ciaglo/Houston Chronicle via AP)Michael Ciaglo, APPeople gather by the Barnett Intermediate School where parents are gathering to pick up their children following a shooting at Santa Fe High School Friday, May 18, 2018, in Santa Fe, Texas. (Marie D. De Jesus/Houston Chronicle via AP)Marie D. De Jesus, APTwo women pray outside the family reunification site following a shooting at Santa Fe High School on Friday, May 18, 2018, in Santa Fe, Texas. (Marie D. De Jesus /Houston Chronicle via AP)Marie D. De Jesus, APStudents are emotional as they gather by the Barnett Intermediate School where parents are gathering to pick up their children following a shooting at Santa Fe High School on Friday, May 18, 2018, in Santa Fe, Texas. (Marie D. De Jesus/Houston Chronicle via AP)Marie D. De Jesus, APPeople react outside the unification center at the Alamo Gym, following a shooting at Santa Fe High School Friday, May 18, 2018, in Santa Fe, Texas. (AP Photo/David J. Phillip)David J. Phillip, APPeople react outside the unification center at the Alamo Gym, following a shooting at Santa Fe High School Friday, May 18, 2018, in Santa Fe, Texas. (AP Photo/David J. Phillip)David J. Phillip, APPeople react outside the unification center at the Alamo Gym, following a shooting at Santa Fe High School Friday, May 18, 2018, in Santa Fe, Texas. (AP Photo/David J. Phillip)David J. Phillip, APA Harris County Sheriff's Department officer works at the scene of a shooting at Santa Fe High School on Friday, May 18, 2018, in Santa Fe, Texas. (Stuart Villanueva/The Galveston County Daily News via AP)Stuart Villanueva, APA woman wipes away tears as she leaves the family reunification site following a shooting at Santa Fe High School on Friday, May 18, 2018, in Santa Fe, Texas. (Jennifer Reynolds/The Galveston County Daily News via AP)Jennifer Reynolds, APNewly elected Santa Fe Mayor Jason Tabor speaks at a press conference in the wake of a school shooting at Santa Fe High School on Friday, May 18, 2018, in Santa Fe, Texas. (Stuart Villanueva/The Galveston County Daily News via AP)Stuart Villanueva, APA family is reunited following a shooting at Santa Fe High School on Friday, May 18, 2018, in Santa Fe, Texas. (Jennifer Reynolds /The Galveston County Daily News via AP)Jennifer Reynolds, APGalveston Police officer Xavier Hancock works at the scene of a shooting at Santa Fe High School on Friday, May 18, 2018, in Santa Fe, Texas. (Stuart Villanueva /The Galveston County Daily News via AP)Stuart Villanueva, APLaw enforcement vehicles are parked outside the Alamo Gym where students and parents wait to reunite following a shooting at Santa Fe High School Friday, May 18, 2018, in Santa Fe, Texas. (AP Photo/David J. Phillip)David J. Phillip, APSanta Fe High School senior Logan Roberds, left, talks to reporters outside the Alamo Gym where students and parents wait to reunite following a shooting at Santa Fe High School Friday, May 18, 2018, in Santa Fe, Texas. (AP Photo/David J. Phillip)David J. Phillip, APPeople wait outside the Alamo Gym where students and parents wait to reunite following a shooting at Santa Fe High School Friday, May 18, 2018, in Santa Fe, Texas. (AP Photo/David J. Phillip)David J. Phillip, APA Texas DPS trooper walks to the scene of a shooting at Santa Fe High School on Friday, May 18, 2018, in Santa Fe, Texas. (Stuart Villanueva /The Galveston County Daily News via AP)Stuart Villanueva, APSanta Fe High School senior Logan Roberds talks to reporters outside the Alamo Gym where students and parents wait to reunite following a shooting at Santa Fe High School Friday, May 18, 2018, in Santa Fe, Texas. (AP Photo/David J. Phillip)David J. Phillip, APA pedestrian waits for ambulances from the shooting at Santa Fe High School at the John Sealy Hospital at the University of Texas Medical Branch in Galveston, Texas, on Friday, May 18, 2018. There were three patients with gunshot wounds admitted to the hospital. (Kelsey Walling /The Galveston County Daily News via AP)Kelsey Walling, APChief Nursing Officer Dr. David Marshall gives an update on patients from the Santa Fe High School shooting at the John Sealy Hospital at the University of Texas Medical Branch in Galveston, Texas on Friday, May 18, 2018. (Kelsey Walling /The Galveston County Daily News via AP)Kelsey Walling, APChief Nursing Officer Dr. David Marshall, left, and Chief Medical and Clinical Officer Dr. Gulshan Sharma give an update on the patients from the Santa Fe High School shooting at the John Sealy Hospital at the University of Texas Medical Branch in Galveston, Texas on Friday, May 18, 2018. (Kelsey Walling /The Galveston County Daily News via AP)Kelsey Walling, APA family comforts each other while waiting at the Santa Fe ISD Alamo Gym where students and faculty are being brought after a shooting at Santa Fe High School on Friday, May 18, 2018, in Santa Fe, Texas. (Jennifer Reynolds /The Galveston County Daily News via AP)Jennifer Reynolds, APCommunity members wait on details at the Santa Fe ISD Alamo Gym where students and faculty are being brought after a shooting at Santa Fe High School on Friday, May 18, 2018, in Santa Fe, Texas. (Jennifer Reynolds /The Galveston County Daily News via AP)Jennifer Reynolds, APLaw enforcement officers respond to Santa Fe High School after an active shooter was reported on campus, Friday, May 18, 2018, in Santa Fe, Texas. ( Steve Gonzales/Houston Chronicle via AP)Steve Gonzales, APA women talks on her phone following a shooting at Santa Fe High School Friday, May 18, 2018, in Santa Fe, Texas. (Michael Ciaglo/Houston Chronicle via AP)Steve Gonzales, APLaw enforcement officers respond to an active shooter in front of Santa Fe High School Friday, May 18, 2018, in Santa Fe, Texas. (Steve Gonzale/Houston Chronicle via AP)Steve Gonzales, APLaw enforcement officers respond to an active shooter in front of Santa Fe High School Friday, May 18, 2018, in Santa Fe, Texas. (Steve Gonzale/Houston Chronicle via AP)Steve Gonzales, APLaw enforcement officers respond to an active shooter in front of Santa Fe High School Friday, May 18, 2018, in Santa Fe, Texas. (Steve Gonzale/Houston Chronicle via AP)Steve Gonzales, APSanta Fe High School freshman Caitlyn Girouard, center, hugs her friend outside the Alamo Gym where students and parents wait to reunite following a shooting at Santa Fe High School Friday, May 18, 2018, in Santa Fe, Texas. (Michael Ciaglo/Houston Chronicle via AP)Michael Ciaglo, AP