The suspect used the screen name "Adolf Hitler (((6 Million)))" while gaming online, according to reports.
About a half hour after the post, the mass shootings were reported at two mosques in Christchurch, New Zealand.
"The students of Parkland refused to settle for the way things are and marched, organized and pushed for the way things should be," wrote former President Barack Obama.
The Kentucky native and co-creator of The Walking Dead ridiculed Republican Gov. Matt Bevin's claim mass shootings are a result of zombie television shows and America's "culture of death."
"When a culture is surrounded by, inundated by, and rewards things that celebrate death—whether it is zombies in television shows, the number of abortions—that we indiscriminately think is just okay."
"There would have been a clear indicator of the shooter in the Tree of Life shooting in Pittsburgh," Eric Adams, the president of Brooklyn Borough, said. "The profile of a person who was mentally unstable of purchasing or possessing a firearm would have been flagged."
Social media outrage grows after company attempts to dismiss liability claims.
A lawyer for the victims hit back at the "outrageous" lawsuit.
The Chinese Embassy in Washington told travellers to purchase medical insurance, prepare for strict immigration checks, and beware "frequent" shootings and robberies.
Students and parents host a "die-in" at Mar-a-Lago to protest the Trump administration's handling of gun control on the second anniversary of the Pulse nightclub shooting.
Dana Loesch claimed the media uses the term "mass shooting" to keep the focus on weapons.
America doesn't have a gun problem. It's enduring a crisis of inappropriately treated mental illness that began decades ago but has worsened in recent years.
The suspect was photographed at a PETA demonstration, but she doesn't appear to have any strong connection to animal rights or welfare organizations.
My son, George Jr., was shot and killed in 2013. Trump's proposal will only make black and brown children like mine less safe.
Josh Kushner is a lifelong Democrat, a spokesman said in 2016, and did not intend on voting for President Donald Trump.
The Wikipedia Project: Firearms group worked to remove mentions of mass shootings or gun control controversies on the "Colt AR-15" Wikipedia page.
The poll also shows rising support for stricter gun laws.
Poll after poll shows near-universal support for some form of gun control, yet some politicians remain reluctant to cross the NRA. What are they so scared of?
Congresswoman accused liberals of 'attempting to politicize tragedies and demonize law-abiding gun owners and conservative Americans'
Cruz's foster parents also reveal that the 19-year-old was set to inherit close to a million dollars in a few years.
In an address to the country on Thursday morning, the president discussed tackling "the difficult issue of mental health," but did not mention gun control.