A faculty member who was at the meeting said that the three women called out "Shooter! " which alerted their colleagues to the danger and saved their lives.
Hammond was hit first in the leg, and then sustained another gunshot wound.
Diane Day, a school therapist who had been at the faculty meeting with Hochsprung, heard screaming, followed by more gunshots.
A second teacher, who was a substitute kindergarten teacher, was wounded in the attack. She later described seeing the door opening and Lanza's boots and legs facing her desk from approximately 20 feet (6.1 m) away.
While she was closing a door further down the hallway, she was hit in the foot with a bullet that ricocheted. He remained standing for a few seconds before turning around and leaving.
The school's security protocols had recently been upgraded, requiring visitors to be individually admitted after visual and identification review by video monitor.
Doors to the school were locked at am each day, after morning arrivals.
Principal Dawn Hochsprung and school psychologist Mary Sherlach were meeting with other faculty members when they heard, but did not recognize, gunshots.Hochsprung, Sherlach, and lead teacher Natalie Hammond went into the hall to determine the source of the sounds and encountered Lanza.The Sandy Hook Elementary School shooting occurred on December 14, 2012, in Newtown, Connecticut, when 20-year-old Adam Lanza fatally shot 20 children aged between 6 and 7 years old, as well as six adult staff members.Prior to driving to the school, Lanza shot and killed his mother at their Newtown home.As first responders arrived at the scene, Lanza committed suicide by shooting himself in the head. The shooting prompted renewed debate about gun control in the United States, including proposals for making the background-check system universal, and for new federal and state gun legislation banning the sale and manufacture of certain types of semi-automatic firearms and magazines with more than ten rounds of ammunition.The incident was the deadliest mass shooting at a high school or grade school in U. history and the third-deadliest mass shooting by a single person in U. A November 2013 report issued by the Connecticut State Attorney's office concluded that Lanza acted alone and planned his actions, but no evidence collected provided any indication as to why he did so, or why he targeted the school.