Nicole Hockley has turned her grief into determined political activism. Her tenacious campaigning is gaining momentum.
As the US Senate votes to allow debate on gun controls, we are a step closer to the inevitable conclusion: That nothing will change.
Devastated Sandy Hook parents have been testifying at a public meeting, urging lawmakers to increase US gun controls.
In one recording released by US authorities, a teacher at Sandy Hook Elementary School tells emergency operators she has heard shooting.
"It sounds like there are gunshots in the hallway. I'm a teacher at the school," she says.
"Keep everybody calm, get everybody away from the windows," she is told. "Try to lock down the school, OK?"
A court order has forced the publication of recordings of emergency calls made to police during the Sandy Hook school shootings in Connecticut, USA, last year.
Operators can be heard responding to witnesses including a teacher and a caretaker who report hearing gunshots.
Prosecutors had tried to block the release of the audio files but a legal challenge from the Associated Press news agency ensured the recordings were made public.
Former pupil Adam Lanza, 20, fatally shot 20 schoolchildren, six members of staff, his mother and himself on 14th December 2012.
Police in the United States made clear this evening that families of the 26 victims of the Sandy Hook school gunman will never know why he shot them.
The family of Victoria Soto, a teacher who shielded her students before being shot to death by Adam Lanza, said the release of the report into the massacre is "yet another blow that our family has been dealt."
"While others search for the answer as to why this happened, we search for the how. How can we live without Vicki? How do we celebrate Christmas without Vicki? Those are the questions we seek the answers for. There is nothing in the report that will answer those for us," the family statement said.
Pictures from inside the Sandy Hook Elementary School released by Connecticut authorities show how Adam Lanza shot his way into the school building through a glass window.
He went on to kill 26 people, including 20 children.
Adam Lanza kept violent video games and articles describing various mass-shootings in his bedroom, the report into the Sandy Hook massacre revealed.
Previously unseen images from inside the gunman's home show more guns and ammunition as well as edged weapons, knives, swords and spears. The photographs also show Lanza's bedroom windows taped over with black bin bags.
Adam Lanza had 253 live rounds on his body when police found him dead in the Sandy Hook Elementary School. He killed 26 people, including 20 children in the attack, firing 154 rounds.
He carried nearly 14 kilograms worth of guns and ammunition, a State Attorney report into the Sandy Hook shootings revealed.
All of firearms Lanza used in the attack were purchased legally by his mother, the report said.
A report into the shootings at Sandy Hook Elementary School has concluded gunman Adam Lanza was "undoubtedly afflicted with mental health problems" and had a "fascination with mass shootings".
The report, prepared by the State Attorney, says: "Those who knew the shooter describe him in contradictory ways. He was undoubtedly afflicted with mental health problems; yet despite a fascination with mass shootings and firearms, he displayed no aggressive or threatening tendencies.
"In some contexts he was viewed as having above-average intelligence; in others below-average.
"Some recalled that the shooter had been bullied; but others – including many teachers – saw nothing of the sort. With some people he could talk with them and be humorous; but many others saw the shooter as unemotional, distant, and remote."
A State Attorney report into the Sandy Hook shootings has now closed and has ruled out any criminal prosecutions.
Adam Lanza, the gunman who killed 20 children and six adults in an elementary school shooting in Connecticut, acted on his own, a year-long inquiry into the massacre has ruled.
The report, published today, admitted that questions about Lanza's motive may "never be answered conclusively."