After the 1999 Columbine high school shootings, finger-pointers in the US were jabbing digits at the violent video game Doom - a favourite of the two killers.
However, some sites go further – Bitcoin-powered shop called Black Market Road, for instance, also sells illegal weapons, something Silk Road withdrew after high profile shootings in the US.
Whether it was presidential election races or the Columbine high school shootings, I'd get a call from Newsnight or the Today programme.
#alllivesmatter #newdaycnn http://t.co/FE4nGswVmI pic.twitter.com/vnJuK2aLtD But the killing has not attracted the same attention as other high profile shootings of young unarmed men by police across the country.
After the high school shootings in Littleton, he says, the discussion about gun control was soon diverted by those who had a stake in doing so: they blamed lack of parental control, video games and the singer Marilyn Manson.
Professor Green said several factors were at work, among them diminishing worry over economic and international threats and a growing concern over the turmoil of political scandals, high school shootings and hate crimes.
A series of armed robberies and high profile shootings in Malaysia has caused many people across the country to turn to self-protection.
But misfortune in America looks like Detroit's outer suburbs and high school shootings.
Since the 1999 Columbine high school shootings, in which two gunmen killed 13 people, including themselves, Colorado has made some placating efforts to curb gun violence.
* Latest among several high-profile shootings in United States (Rewrites throughout with protests over shooting; changes dateline to North Charleston).
