A U.S. congressman is calling for the FBI to investigate law enforcement’s response to the massacre in Uvalde, Texas, that killed 19 children and two teachers earlier this week.

Rep. Joaquin Castro, D-Texas, wrote a letter to FBI Director Christopher Wray citing conflicting reports given by police about the timeline of events of the shooting and officers’ interactions with the shooter. 

“The people of Uvalde, of Texas, and of the nation deserve an accurate account of what transpired,” Castro wrote.

The law enforcement response to the massacre is under investigation. Witnesses and neighbors have contested officials’ statements about the events, while law enforcement officials have revised parts of their accounts. Officials have sought to assure the public that they responded immediately to the shooting as complaints surfaced about a delay in taking action and entering the school.

Castro said answers were needed about conflicting accounts: “Whether the school security officer and the gunman exchanged fire outside the school,” and, “How long law enforcement officers were in adjoining classrooms while the gunman barricaded himself in a classroom with students and teachers.”

TEXAS SCHOOL SHOOTING VICTIMS LIST: Families mourn those lost in the Texas school shooting

What we know about the 21 victims

Families and community members gathered Thursday to mourn the 19 children and two teachers killed at Robb Elementary School in Tuesday’s massacre as more of the victims’ identities became known.

At a park in Uvalde, crosses bearing the names of the slain students and teachers were erected. 

The two teachers who were killed, Irma Garcia and Eva Mireles, co-taught their fourth graders and were called hailed as heroes for protecting students. Garcia’s husband, Joe Garcia, laid flowers at his wife’s memorial site, but died suddenly later Thursday, leaving their four children with two funerals to plan.

The children who were killed included 10-year-old Xavier Javier Lopez, who loved to crack jokes and dance cumbia with his family, his mother Felicha Martinez told The Washington Post. 

Layla Salazar, 10, was a fast runner who won ribbons at the school’s field day and sang along to “Sweet Child O’ Mine” by Guns N’ Roses on the way to school each morning, her dad Vincent Salazar said.

Jayce Luevanos, 10, woke up every morning and made his grandparents a pot of coffee, his grandfather Carmelo Quiroz said. He was happy and loved, Quiroz said. “He was our baby.” Read more.

NRA convention starts Friday as lobbyists deflect blame for massacre

The National Rifle Association begins its annual convention in Houston on Friday, and leaders of the powerful gun-rights lobbying group are gearing up to “reflect on” – and deflect any blame for – the deadly shooting earlier this week in Uvalde, Texas.