On Wednesday, a former student of Marjory Stoneman Douglas High School in Parkland, Florida, shot 17 people dead and injured 14 more in the deadliest U.S. school shooting since Sandy Hook.
The accused 19-year-old, who was apprehended after apparently fleeing the scene, reportedly commented on a YouTube video last year that he would be a professional "school shooter." The FBI was made aware of the comment at the time. The teenager was also a concern to school staff, and had been banned from carrying a backpack while on the campus.
In the hours since, social media has, as usual, been a platform for gun reform debate. Especially since the shooting came just short of a year after President Trump rescinded an Obama-era rule aimed at blocking gun sales to certain mentally ill people.