In the first episode of Substance, our guest is someone who is at the front line of countering state and police violence. He is a London-based Israeli architect who was recently banned from entering the United States. He came to prominence through detailed digital reenactments of incidents regarding human rights abuses and disputed assassinations. Eyal Weizman is the founder of the Turner Prize nominated research collective Forensic Architecture. a research group known for its use of architectural, spatial, and technological analysis to uncover violence.