The New York Times said a "trail of digital evidence" led to a 21-year-old national guardsman named Jack Teixeira as the leader of the private chat group, called Thug Shaker Central. He has not been officially identified as a suspect. San Francisco-based Discord was created in 2015 primarily as a platform for gamers to chat, but it has also become an alternative for users disenchanted with major players Facebook, Instagram or Twitter. Discord allows communities to set up something called servers, which are virtual spaces where users can chat, share media, and connect with other users who share similar interests....