by A.C. Thompson, ProPublica and FRONTLINE, and James Bandler, ProPublica ProPublica is a nonprofit newsroom that investigates abuses of power. Sign up to receive our biggest stories as soon as theyre published. A Wisconsin teenager accused of murdering two family members and plotting to assassinate President Donald Trump was inspired by Terrorgram, a white supremacist network that operated on the Telegram messaging and social media platform for half a decade, according to federal court records. The Terrorgram community, which has been linked to around three dozen criminal cases around the globe, including at least three mass shootings, was profiled last month in stories and a documentary produced by ProPublica and FRONTLINE.The court documents allege that Nikita Casap, a 17-year-old from Waukesha, Wisconsin, wrote a three-page manifesto calling for the assassination of Trump in order to foment a political revolution in the United States and save the white race from Jewish controlled politicians. In his manifesto, Casap allegedly encouraged people to read the writings of Juraj Krajk, a longtime Terrogram figure who murdered two people in an attack on an LGBTQ+ bar in Bratislava, Slovakia, in 2022, according to the court records. Casap also allegedly recommended two publications produced by the Terrorgram Collective, a secretive group that produced alleged hit lists, videos and written publications including instructions for building bombs and sabotaging critical infrastructure and distributed them throughout the Terrorgram ecosystem.Launched in 2019, Terrorgram was a constellation of scores of Telegram channels and chat groups focused on inciting acts of white supremacist terrorism and anti-government sabotage. At the networks peak, some Terrorgram channels drew thousands of followers. Over the past six months, however, the network has been disrupted as authorities in Canada, the U.S. and Europe have arrested key Terrorgram influencers and community members. But the violence hasnt stopped. Casap in February allegedly shot and killed his mother, Tatiana Casap, and stepfather, Donald Mayer; stole their property; and fled in their Volkswagen Atlas, Waukesha County prosecutors say. He was arrested in Kansas. Prosecutors have charged the teen with two counts of first-degree homicide, as well as identity theft and other theft charges. He is expected to be arraigned on May 7, according to court records. A witness told local investigators that Casap was in touch with a male in Russia through the Telegram app and they were planning to overthrow the U.S. government and assassinate President Trump, according to charging documents in the Wisconsin case. The newly unsealed federal court filings indicate that the FBI is investigating Casap in connection to the alleged assassination plot. The bureau declined to comment on the matter.Last fall, federal prosecutors accused two Americans of acting as leaders of the Terrorgram Collective and charged them with soliciting the murder of federal officials and a host of other terrorism-related offenses. The U.S. State Department has officially designated the Terrorgram Collective as a terrorist organization, as have officials in the United Kingdom and Australia. The two Americans have pleaded not guilty to the charges.Do absolutely anything you can that will lead to the collapse of America or any country you live in, Casap allegedly wrote in his manifesto, according to an FBI affidavit. This is the only way we can save the White race. The teens writings and online postings that are cited in the affidavit indicate that he is a believer in militant accelerationism, a concept that has become increasingly popular with neo-Nazis and other right-wing extremists over the past decade. Militant accelerationists aim to speed the collapse of modern society through acts of spectacular violence; from the ruins of todays democracies, they aim to build all-white ethno-states organized on fascist principles.Matthew Kriner, executive director of the Institute for Countering Digital Extremism, a nonprofit think tank, called the alleged Casap plot unique. Its the first time were explicitly seeing an individual tie an accelerationist act or plot with the president of the United States as a means of collapsing society, Kriner said. I think what we have here is a fairly clear-cut case of an individual who is being groomed to take drastic terrorist action in an accelerationist manner.Casaps public defender could not be reached for comment. A Telegram spokesperson said, Telegram supports the peaceful exchange of ideas; however, calls for violence are strictly prohibited by our Terms of Service and are removed proactively as well as in response to user reports."A ProPublica and FRONTLINE review shows that Casap was recently active in at least five extremist Telegram channels or chat groups, including a Russian-language neo-Nazi chat in which posters uploaded detailed instructions for crafting explosives, poisons and improvised firearms. He was also a member of a chat group with more than 4,300 participants run by the Misanthropic Division, a global neo-Nazi organization. Casap, according to the federal documents, also sought out information online about the Order of Nine Angles, a cult that blends Satanic concepts and Nazi ideology and has increasingly turned to Telegram to recruit and proselytize. This is a clear example of how Terrorgram continues to influence murder, said Jennefer Harper, a researcher who studies online extremism. Nikita was influenced online by an assortment of ideologies and groups that intersect with the Terrorgram ecosphere.