Ulrich Rüdiger, rector of RWTH Aachen, canceled a lecture on police killings by Phoebe Walton from Forensis / Forensic Architecture on the grounds of an “imminent security threat.” Forensic Architecture is a research firm that investigates human rights concerns worldwide and has published reports on Israeli state violence. The event nonetheless took place unofficially via Zoom, organized by a group of students without the university's involvement.