Casap, in custody at the Waukesha County jail on a $1 million bond, is due in court next month to enter a plea. County prosecutors have offered a glimpse of the federal allegations, which were outlined in an FBI warrant unsealed Friday.
Federal authorities accuse Casap of planning his parents' murders, buying a drone and explosives, and sharing his plans with others, including a Russian speaker. His intentions are detailed in a three-page antisemitic manifesto praising Adolf Hitler. The warrant filed at the federal court in Milwaukee also contains excerpts of communications on TikTok and the Telegram messenger app.