[RickeyM]

Further details revealed that police waited outside the school for forty minutes or more before entering the building despite pleas from onlookers outside.

Desperate onlookers urged police to charge into the school where their children were trapped. Instead, police massed outside the building for 40 minutes and waited.

Javier Cazares, whose fourth-grade daughter, Jacklyn Cazares, was killed in the attack, said he raced to the school when he heard about the shooting, arriving while police officers massed outside the building.

Upset that the police were not moving in, he raised the idea of charging into the school with several other bystanders.

Once inside it seems police were stymied by a locked door.

Meanwhile, a law-enforcement official familiar with the investigation said the Border Patrol agents had trouble breaching the classroom door and had to get a staff member to open the room with a key.