Grocery stores have spent fifty years using behavioral research to change how you shop — down to the scent of the bread and the height of the cereal. Meanwhile, the way we interview and investigate hasn't meaningfully changed since 1955. If a soda bottle can be upgraded with science, why not the interview?

I get this question in almost every class: what's with all the goats? It started as a way to say thank you — cartoon GOAT stickers and a handwritten note for detectives who did great work. It ended up teaching me something about science-based interviewing. One good opening question once got 14 minutes of lies from a man now serving 30 years for murder. Every one of those lies was information. Statements are evidence. Here's why that changes how you interview — and how you lea