Nicole Hockley has turned her grief into determined political activism. Her tenacious campaigning is gaining momentum.
30,000 Americans sign a petition calling for Piers Morgan to be deported for his gun control views, meaning the White House must respond.
As President Obama calls for "concrete proposals" to curb gun violence, some shooting enthusiasts have doubts they will work in practice.
Police believe a phone call reporting a man was en route to Yale University's campus "with the intention of shooting people" may have been a hoax.
Yale University in New Haven, Connecticut, was lockdown following the security alert, with Yale, New Haven and state police among the forces who descended on the Old Campus in the hunt for the gunman.
New Haven Police Chief Dean Esserman said the anonymous caller, who is not believed to be a student, was the one making the threat.
Esserman said the FBI is using voice recognition software to try and determine the identity of the caller, who will then be arrested and charged.
"We're going to find the person who made that call, we're going to put handcuffs on the person who made that call," Esserman added.
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."
Yale University said it has lifted its "shelter in place" and lockdown alert "with the exception of Old Campus and Calhoun College".
The Ivy League university wrote on Twitter:
Shelter in Place lifted w/ exception of Old Campus & Calhoun College. http://t.co/GWOeIeUZgu
No further details were given.
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."
Police are going door to door at Yale University to search for a gunman on campus, a spokesman has warned.
Yale University urged students and staff to co-operate, warning, "When they knock on your door, a Yale police officer will slip their Yale ID under the door".
"Police may use keys, but they will identify themselves", the university website added.
Libraries and some public schools are also on lockdown as the search continues, New Haven Police Department spokesman David Hartman said.
New Haven Police Department received an anonymous tip off from a male caller that his room-mate was en route to the Yale University campus "with the intention of shooting people", a spokesman said.
Police spokesman David Hartman told reporters both the caller and the gunman have yet to be identified.
He told a press conference: "There has been no report of gunfire, there has been no report of injuries of anyone.
"We are interviewing [two] witnesses who did report seeing somebody on or near the university campus with a long gun ... either a rifle or a shotgun".
Officers from the Yale Police Department, New Haven Police and Connecticut State Police are "actively searching for any gunman" on the scene at the university's Old Campus, Yale's website states.
Issuing a renewed alert, Yale University warns its students and staff that the lockdown continues, adding, "THIS IS NOT A TEST".
Anyone with information on the gunman have been urged to call the emergency services.