Some 376 law enforcement officers massed at the school, yet 'no responder seized the initiative to establish an incident command post,' investigation finds, drawing parents' rage

Footage sparks fresh anger over seemingly lackadaisical response to school shooting by officers, with families already bemoaning chaotic investigation and lack of answers

Cry for help from truck container leads to grisly discovery; another 16, including 4 children, hospitalized with heat-related illnesses; three suspects detained

Head of state police raps district chief's 'terrible decisions,' prioritizing officers' lives over those of 19 students killed; mayor pushes back, calls Senate hearing 'clown show'

Survivors and parents of victims from shootings in Buffalo and Texas recount harrowing shootings, urging lawmakers to take action on guns

Among the injured are several fourth-grade students whose classmates and teachers were shot dead; 8-year-old Jeremiah Lennon feared he would be killed if he went back to school

Blame after mass school shooting being directed at Pete Arredondo, who grew up in Texas town and entered post last month pledging to prioritize communication and solution-finding

Investigation could take months but likely to center around why a school district police chief had power to tell officers to wait an hour as massacre unfolded on other side of door

Over next two-and-a-half weeks, people in southwestern Texas town will hold funerals one after the other for 19 students killed, as investigators push for answers on police conduct

Some locals thank president for visiting, while others urge him to 'do something,' as the city mourns 19 of its children and two teachers shot dead last week